Datasets:

cwinkler

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patents_green_plastics

like 1

monomer addition methodology is provided to adjust monomer addition rates to a polymerization reactor . advantages of the invention include control of bioabsorbable copolymer structure , improvement of monomer conversion , control of reaction temperature , and reduced reaction time . the overall result is an improved process and enhanced product performance . the technology is particularly useful in the copolymerization of monomers with different reactivity ratios , such as glycolide / lactide copolymers and glycolide / caprolactone copolymers . monomer reactivity ratios and reaction kinetics are utilized to adjust monomer addition rates .

a reusable airflow sensor for monitoring respiratory activity of patients in a sleep lab setting comprises a polyvinylidne fluoride film totally encased within a thermally conductive plastic material that is non - hydroscopic and therefore impervious to moisture which allows resterilization without comprising the electrical performance of the sensor .

a li - ion battery cell comprising a polymeric matrix positive electrode layer member , a polymeric matrix negative electrode layer member , and an interposed microporous polyolefin separator layer member is laminated into a unitary , flexible cell structure by means of heat and pressure without necessity for applied interlayer adhesive . a primary plasticizer for the electrode member matrix polymer is included in the electrode layer compositions . during the lamination operation , which may be carried out at a moderate - temperature that does not compromise the thermal shutdown capability of the microporous separator , the plasticizer softens the polymer into a thermoplastic adhesive which forms an effective bond to the untreated polyolefin surface in the region of the electrode / separator interface . the plasticizer dissipates from the composition along with residual lamination heat or may be extracted with solvent or supercritical fluid , thereby enabling the electrode polymer alone to form a strong , permanent bond to the polyolefin separator member .

a rigid packaging material having a coating of heat - sealable , anti - static plastic . a fiberboard sheet substrate is coated with a lamina of polyethylene made electrostatic - free by the addition of an organic anti - static compound . when skin - packaged with a film of heat sealable , anti - static plastic material , a static - sensitive item is completely enclosed by a static - free barrier package .

a multilayer plastic pipe having improved barrier action against diffusion of the substance being transported , particularly methanol - containing fuels , dimensional stability , and resistance to mechanical stress , is provided comprising : an inner layer and an outer layer , each of which comprise a polyamide - based molding composition , wherein the inner layer and outer layer may be the same or different , and at least one intermediate layer comprising a linear , crystalline polyester - based molding composition interposed between and bonding together the inner and outer layers .

a method and apparatus for storing and dispensing fluids such as syphon seltzer water under about 10 atmospheres of pressure . a plastic bottle is provided in which a valve mechanism is inserted within the neck of the bottle . a disposable cap covers the end of the bottle to prevent contamination of the valve during storage . when the contents of the bottle are to be dispensed , the cap is removed and discarded and a head member is attached to the outside wall of the neck of the bottle . the head contains a valve actuation mechanism which opens the valve and the liquid is dispensed through a nozzle in the head . the head may be removed when the contents of the bottle are dispensed or at any time before being fully dispensed . the bottle is discarded or recycled and the head member is detached and reattached to a full bottle of liquid , such as syphon seltzer water .

a liquid phase conjugate formed of a bioactive agent such as a drug compound , e . g . ziprasidone , and a liquid polymer of requisite functionality is disclosed .

a once - a - day controlled release drug delivery system of diltiazem hydrochloride is provided , which is bioequivalent in plasma profile of cardizem cd . the fast , medium , and slow release fractions are prepared using various compositions and weight gains . the individual fill weights are computed and then are filled into the same capsule using specialized encapsulation equipment using a triple - filling process . a preferred membrane dispersion that is used for preparing the fast release fraction contains 0 . 2 % of sodium lauryl sulfate along with 20 % of water soluble plasticizer , and 2 % silicone dioxide , based on quaternary polymethacrylate on the weight basis . this combination provides an initial pulsatile burst after a lag time of 2 hours , leading to in - vivo bioequivalence . the preferred membrane dispersion that is used for preparing the medium release and the slow release fractions contain 16 % of water soluble plasticizer along with 5 % silicone dioxide , based on quaternary polymethacrylate . this combination provides an optimal glass transition temperature that allows for the preparation of exceptionally increased weight gains . additionally , it provides targeted input of drug release for achieving bioequivalence . regardless of significant in - vitro inequivalence to the release rate profile of the innovator product , the in vivo - equivalence data comply with required regulatory guidelines .

polymeric chelating agents and metal chelates , particularly those of lanthanide metals and more specifically those of gd , useful as contrast agents in magnetic resonance imaging for therapeutic and diagnostic applications as well as clinical and biomedical research applications . the polymeric chelates are generated using ring - opening metathesis polymerization . polymers can have multiple sites for functionalization allowing for the synthesis of multimodal and targeted contrast agents . hydroxypyridonate - based chelating moieties are integrated into a romp - derived polymer . more specifically , the hopo - based chelating moiety is integrated into a benzonorbornadiene unit that constitutes the backbone of the polymer . the romp - derived polymer chelators can comprise multiple metal ions , particularly gd ions , in polymers of varying lengths to provide a series of agents with controlled relaxivites . polymer chelates include those that are water - soluble .

a solid material adapted to kill bacteria in planktonic , spore and biofilm states is lethal toward a wide spectrum of gram positive and gram negative bacteria as well as other microbes . the solid material includes a significant amount of one or more surfactants entrained in a crosslinked polymeric network .

a biological filtration system includes a reservoir configured to receive an aqueous liquid , a multiplicity of polymeric container closures in the reservoir , a fluid inlet fluidically coupled with the reservoir , and a fluid outlet fluidically coupled with the reservoir . the fluid inlet is configured such that an aqueous liquid provided to the reservoir via the fluid inlet contacts the multiplicity of polymeric container closures . the polymeric container closures support biofilm growth . treating the aqueous liquid provided to the biological filtration system includes contacting the polymeric container closures with the aqueous liquid , growing biofilm on the polymeric container closures in contact with the aqueous liquid , thereby removing contaminants from the aqueous liquid to yield a treated aqueous liquid , and removing the treated aqueous liquid from the biological filtration system . the polymeric container closures may be reclaimed following consumer or industrial use , thereby conserving resources and reducing costs related to biofilm carriers .

the invention provides a lenticular lens type three - dimensional image display device and a method of fabricating the device without a need for a clear plastic substrate transposed between the image and lenticular lenses . the device can be obtained by directly printing curable coatings onto the image , making them particularly well suited for volume production . the combination the image printing and application of curable coatings process can be joined together to conduct the single pass - process . the single pass - process allows for flexibility of the printing only selective areas of the substrate . moreover , this process allows the device to be recyclable .

a fiber - based surgical implant stabilized against fraying , includes a thermally crimped flat - knitted fabric of a biocompatible , optionally biodegradable , polymer material having a glass transition temperature or other thermally induced secondary conformational mobility threshold in the temperature range of from 20 ° c . to + 170 ° c . also disclosed is a corresponding fabric and methods of producing the implant and the fabric .

the invention is a method of making a wet formed , sheeted , readily reslurriable sheeted crosslinked cellulose and the products made by the method . crosslinked wood pulp fibers tend to be quite brittle . if crosslinked while in sheeted form , the sheets cannot be readily defibered , either in a wet or dry state , without serious fiber degradation . the sheet products of the present invention can be easily redispersed or repulped in water without significant fiber breakage . the present products are made by including within the sheet , while still in wet form , a debonding or softening agent which is preferably added before the latent crosslinking reactant . most preferably the debonder is added prior to the headbox of a paper machine and the crosslinking reactant is applied near the end of the forming wire or at the press section . the treated sheet is dried conventionally . crosslinking may occur entirely during drying or during a period of additional heating , usually at a temperature in excess of 100 ° c . for a short period of time . conventional debonding agents and crosslinking reactants are suitable . the softening agent apparently reduces or prevents adhesive bonding between adjacent fibers caused by polymer formation external to the fibers under reaction conditions .

a process for forming linear , thermoplastic weatherseals into a bend position is provided which avoids buckling of the thinner surfaces of the weatherseal material . the process involves the use of a support insert which supports the thinner surfaces during the bending operation , and thus assists in preventing the deformation of the thinner weatherseal surfaces . the support is preferable constructed of a material which is unaffected by temperatures higher than the heat - deformation temperature used to set the weatherseal material into a bent configuration , and thus , the support insert retains its linear shape when removed from the bending press , and therefore , can be reused . an improved process for manufacturing bent thermoplastic weatherseal material results .

a biocompatible wound dressing comprised of a pad for insertion substantially into a wound site and wound drape for sealing enclosure of the foam pad at the wound site . the pad , comprised of a foam or other like material having relatively few open cells in contact with the areas upon which cell growth is to be encouraged so as to avoid unwanted adhesions , but having sufficiently numerous open cells so that drainage and negative pressure therapy may continue unimpaired , is placed in fluid communication with a vacuum source for promotion of fluid drainage , as known in the art . the pad is further comprised of an ultra - low density fused - fibrous ceramic , or a bioabsorbable branched polymer , or cell growth enhancing matrix or scaffolding .

a machine and method for providing a folded liner for insertion into a pipe , comprises an upper section and a lower section . a flattened heated thermoplastic liner is fed downwardly through the upper section to the lower section , where it is redirected and fed substantially horizontally from the lower section . the flattened liner introduced to the upper section is broadly indented at one side of the liner and is then more acutely indented to provide loops disposed side - by - side in a substantially horizontal direction . the lower section reorients the loops so that they are stacked side - by - side in a substantially vertical direction . the liner is cooled as its leaves the lower section to maintain its cross - sectional configuration . the upper section is separable from the lower section , and portions of the upper and lower sections are displaceable and removable to facilitate insertion of the liner into the machine and removal of the machine from the liner .

present invention provides a new class of polymeric materials having utility in the formation of self assembled polymer layers on a pretreated metallic substrate . the polymeric materials are copolymers and terpolymers of styrene and styrenic derivatives containing a reactive group selected from the group consisting of hydroxy , thiol acetoxy , thioacetoxy , thiocyanate , thiolmethyl , thioacetoxymethyl , carboxy , and mixtures thereof .

a finish laminate for high - frequency circuits , which consists of a metal - covered multilayer structure composed of at least one fundamental laminate in which a glass cloth layer is laminated on at least one side of an ultrahigh molecular - weight polyethylene layer with an adhesive layer interposed between the layers and , one fundamental laminate being able to be laminated on another with an adhesive layer interposed therebetween , and a metal foil laminated on at least one outermost layer of the multilayer structure with an adhesive layer interposed therebetween . in one embodiment , the glass cloth layer may be impregnated with a curable thermosetting resin or with this resin and a thermoplastic resin to form a resin - containing glass cloth layer or , thereby dispensing with an adhesive layer when laminating a metal foil on the outermost layer of the multilayer structure .

a bag for containing produce and the like which comprises a central section and two end sections . the end sections they each comprise sections of thermoplastic sheeting , sealed together to provide a pair of facing bag walls defining a bag interior . the central section of the bag comprises at least one plastic mesh sheet . the central section defines a pair of facing , peripherally sealed walls , at least one of the walls comprising the plastic mesh sheet to further define the bag interior .

a synthetic method for preparation of hybrid inorganic / organic energetic nanocomposites is disclosed herein . the method employs the use of stable metal inorganic salts and organic solvents as well as an organic polymer with good solubility in the solvent system to produce novel nanocomposite energetic materials . in addition , fuel metal powders can be incorporated into composition . this material has been characterized by thermal methods , energy - filtered transmission electron microscopy , n 2 adsoprtion / desorption methods , and fourier - transform spectroscopy . according to these characterization methods the organic polymer phase fills the nanopores of the composite material , providing superb mixing of the component phases in the energetic nanocomposite .

apparatus for resin sealing semiconductor devices is disclosed , wherein semiconductor devices such as semiconductor chips are placed in cavities provided in a pair of chase blocks , which are clamped by a press machine through support members capable of elastic compressive deformation . plastic is then injected into the cavities of the chase blocks such as to resin seal the semiconductor devices . also disclosed is a device for resin sealing semiconductor devices , which device comprises : a pair of chase blocks equipped with cavities for holding semiconductor devices , a press machine for pressing the chase blocks against each other through a pair of press surfaces , a plurality of support members adapted to hold the chase blocks over the respective press surfaces of the press machine and to undergo elastic compressive deformation during the press operation of the press machine , and a plastic injector for injecting plastic into the cavities provided in the chase blocks .

a method is disclosed herein for treating a polymeric surface to resist non - specific binding of biomolecules and attachment of cells . the method includes the steps of : imparting a charge to the polymeric surface to produce a charged surface ; exposing the charged surface to a nitrogen - rich polymer to form a polymerized surface ; exposing the polymerized surface to an oxidized polysaccharide to form an aldehyde surface ; and exposing the aldehyde surface to a reducing agent . advantageously , a method is provided which produces surfaces that resist non - specific protein binding and cell attachment and that avoids the use of photochemical reactions or prior art specially designed compounds .

a method of deploying a borehole filtration device is provided utilizing the steps of : deploying a filtration device comprising a polymer foam having a first cell structure , a portion of the molecular structure of which polymer foam is degradable by exposure to a post - treatment fluid , into a borehole ; and exposing the polymer foam to the post - treatment fluid , thereby modifying the cell structure of the polymer foam to a second cell structure .

a specific class of thermoplastic polymers with improved processability resulting from initial partial degradation of high molecular weight polymers using a chemical prodegradant present in excess of the amount reacted during pelletization . this class of polymers includes polymers and copolymers of polypropylene and butylene . after pelletizing , the polymer including unreacted prodegradant can be safely handled and shipped without difficulty . when remelted by extruding or the like , the prodegradant in the pellets reacts , further reducing the molecular weight as well as narrowing the molecular weight distribution of the polymer to a point where high capacity production of quality fibers and extruded products can be obtained . the prodegradant is preferably of the type that predictably and controllably affects the polymer molecular properties without being significantly affected by minor fluctuations in the polymer producer &# 39 ; s or processor &# 39 ; s manufacturing steps . specific preferred embodiments include 2 , 5 - dimethyl - 2 , 5 bis - hexyne - 3 ; 3 , 6 , 6 , 9 , 9 - pentamethyl - 3 -- 1 , 2 , 4 , 5 - textraoxy cyclononane ; α , α &# 39 ;- bis diispropyl benzene and 2 , 5 - dimethyl - 2 , 5 - di hexane as the prodegradant added in an amount providing an amount of unreacted prodegradant after pelletizing of about 0 . 01 to 10 . 0 percent based on the weight of polymer . the present invention reduces the safety hazards present when handling free radical prodegradants by the polymer processor and avoids the need for multiple addition of prodegradants while still producing a material that can be processed easily by the polymer producer and processor .

biodegradible polymers are provided which may contain a biologically active substance , e . g . a drug such as insulin , which is released over a period of time as the polymer erodes when in contact with a body fluid . the polymer contains an amine functionality whereby it erodes faster at low acid ph &# 39 ; s than at higher acid ph &# 39 ; s . as an example , the polymer may contain insulin and may contain or may have an encapsulating hydrogel containing glucose oxidase . as the blood sugar level of a diabetic person rises , e . g ., afte a meal , glucose diffuses into the polymer or hydrogel and is converted to gluconic acid which lowers the ph , and accelerates erosion and the release of insulin .

the present invention is related to a polymeric delivery vehicle for delivery of bioactive agents , and preferably , for the delivery of one or more bioactive agents . the device , when applied as described herein , provides substantially complete anti - microbial coverage around the entry point of a percutaneous device and , preferably for a length greater than the diameter of the device .

in a preferred embodiment , taxol is treated with mesyl chloride to prepare a taxol derivative with a contracted a - ring , which has comparable activity to taxol in a tubulin depolymerization assay , and which shows cytotoxicity against kb cells in a cell culture assay . in an alternate preferred embodiment , taxol is treated with triethyloxonium tetrafluoroborate to produce a taxol derivative with an opened oxetane ring . in another alternate preferred embodiment , reaction of taxol with acetyl chloride yields a taxol derivative in which the oxetane ring is opened and the a - ring is contracted . all of the aforementioned products show in vivo activity in kb cell culture assays . further , the preferred compounds have different in vivo activities , which makes them ideal to form a range of standards for use in biological testing of other compounds .

an automobile bumper retention system is provided including a plastic foam energy absorbent bumper which is held firmly in place by a metal bumper beam . the beam is provided with integral ribs or beads that fit into a matching groove in the energy absorbing bumper in order to support the energy absorbing bumper in a snap - fit engagement or a slide - in engagement .

embodiments of the present invention involve three - layer printing members having a central layer that is non - conductive yet abalatable at commercially realistic fluence levels . in various embodiments , the central layer is polymeric with a dispersion of nonconductive carbon black particles therein at a loading level sufficient to provide at least partial layer ablatability and water compatibility of the resulting ablation debris .

a compact form - fill - seal machine capable of the high speed production , collation and loading into cartons of a variety of small dispensing packages with instant opening features including fault lines in the lower containment formation . it can make a variety of formations in the upper cover member as well as fault lines . it also produces simple cups and tubs . the machine operates at extremely high efficiency with practically every known thermoformable plastic film .

polymeric or polymerizable material with oriented magnetic anisotropic particles is subjected to magnetic fields that reorient the magnetic particles . the result is an aesthetic patterned appearance .

a signal processing method for analyzing an autoradiograph to identify the locations of radioactively labeled substances which have been resolved in a one - dimensional developing direction on a support medium is provided . according to this method , digital image data including a plurality of different levels and values obtained by placing the support medium and a radiographic film together in layers to record the autoradiograph of the radioactively labeled substances are subjected to digital signal processing to identify their positions in a manner which substantially eliminates background noise . a stimulable phosphor sheet can be used in place of the radiographic film to record the autoradiograph . the method described herein may be effectively used to identify selected components of various biopolymers .

a bioresorbable material is disclosed having a ceramic and polymer coating . the ceramic and polymer coating increases the tailorability of resorption rates and properties and increases design flexibility by virtue of its simplicity .

a method of cleaning a pin head or other implements between handling a plurality of samples of nucleic acid subject to an amplification process using a biochemical amplification product . the method comprises exposing the pin head or other implement to ultraviolet and preferably also infrared illumination between handling different samples in order to suppress cross - contamination by non - specific amplification . the biochemical amplification product may be obtained from a rolling circle amplification procedure , such as that catalyzed by bacteriophage phi29 , or a polymerase chain reaction amplification product .

the present invention is directed to a method of fabricating a successive set of patterns representing incremental stages of an orthodontic treatment plan , and then sending all or a portion of the successive patterns at the same time to the dentist . the dentist is provided with a vacuum machine for thermoforming a set of aligners as negative impressions of the positive teeth patterns . a polymeric sheet is inserted into a vacuum forming machine and sucked down over the positive pattern , forming a polymeric shell with cavities shaped to receive the teeth and resiliently bias or reposition at least some of the teeth into alignment with the aligner cavities . when the aligner is formed and while still on the stereolithographic plastic pattern , excess portions of the aligner polymeric material are trimmed using manual tools and / or a laser cutting machine .

coating compositions for blocking heat from hyperthermal sources are reinforced with high - temperature , high emissivity , open weave fabrics . the coating compositions contain materials which actively respond to excessively high temperatures by undergoing endothermic processes or by swelling , preferably by both . the preferred fabrics are made of graphite or cardo - polymer yarns . the reinforced compositions may be applied directly to a substrate , or they may be molded into self - supporting shapes which are applied to the substrate or are themselves structural units .

a process is provided for making thermoplastic - composites from recycled thermoplastics together with phosphogypsum waste by - product from the phosphate fertilizer wet process or , in an equally preferred embodiment with fluorogypsum waste by - product from fluorine production wet process to produce lumber profiles . the process involves admixing phosphogypsum and / or fluorogypsum waste byproduct and / or flue gas desulfurization gypsum and / or crude gypsum and / or calcined gypsum with thermoplastics and a functionalized compound with or without coupling agents to produce a filled thermoplastic - composite composition , and melt processing the composition to produce a filled thermoplastic - composite article . the articles are preferably in the form of railroad cross ties or construction articles such as common lumber profiles , panels , tiles , poles , utility poles , crossarms for utility poles , roofing tiles , pipeline skids , pilings , marine fender - piles , bulkheads , revetments , and are useful for constructing various structures , such as oilfield board roads and equipment mats . the process avoids the accumulation of undesired phosphogypsum / fluorogypsum “ stacks ” and provides environmentally friendly useful products which require no chemical preservatives to prevent insect infestation or decay from the elements . tailings from ore processing can also be used as a filler .

a fishhook is described which disintegrates upon standing for prolonged periods of time in an aqueous environment such as within biological tissue . in one embodiment , the fishhook comprises a biodegradable polymeric hook - shaped structure with at least one metal tip affixed thereto providing a sharp piercing element . upon exposure to the chemical environment of the fish &# 39 ; s tissue the polymer biodegrades . in another embodiment , a substantially insoluble or non - biodegradable body portion of the hook has a separable point and barb portion affixed to the insoluble portion by means of a biodegradable adhesive . when the fishhook penetrates the fish &# 39 ; s tissue , the solvents and / or enzymes present in the tissue environment causes the adhesive to release the barb and / or the point of the fishhook and the fish may shed the disintegrated fragments . in yet another embodiment , the entire fishhook is fabricated from a biodegradable polymer such as polylactide or polyglycolide or a copolymer thereof .

the present invention provides novel methods of treating anti - neoplastic and non - neoplastic cell proliferative diseases . the present methods involve administration of triplex forming oligonucleotides to humans to inhibit the biological activity of tumor necrosis factor . also provided are methods of treating neuro - oncologic states and renal cancer .

an access floor panel construction employing peripheral trim channel elements joined together at the panel corners and fixed at their mid - lengths to the edges of a main body . as disclosed , the trim elements are of an organic thermoplastic material and are ultrasonically welded together at their ends and thermoplastically deformed into receiving portions of the main body edges . an assembly fixture holds the trim elements in position for final assembly in a manner which reduces the size of any gaps which might occur as a result of dimensional tolerances in the panel components .

the instant invention involves the use of a combination of preparatory steps in conjunction with mass spectroscopy and time - of - flight detection procedures to maximize the diversity of biopolymers which are verifiable within a particular sample . the cohort of biopolymers verified within such a sample is then viewed with reference to their ability to evidence at least one particular disease state ; thereby enabling a diagnostician to gain the ability to characterize either the presence or absence of said at least one disease state relative to recognition of the presence and / or the absence of said biopolymer , predict disease risk assessment , and develop therapeutic avenues against said disease .

chain transfer agents that are chlorine - free and liquid under polymerization conditions , useful for fluoromonomer polymerization , have the following formula : r 1 — o — r 2 . they are superior to common chain transfer agents such as chloroform in being safer and environmentally benign . they are also superior to gaseous chain transfer agents such as ethane because they do not enter the fluoromonomer gas recycle streams and so do not complicate the analysis and purification of those streams .

a method is generally provided for attaching a polymer chain onto a surface of a nanoparticle , where the polymer chain comprises a cyclic arrangement of saccharides . the resulting grafted nanoparticle is also generally provided , along with its methods of use by exposing to a bacteria colony .

fully cured thermoset ethylene - propylene rubber sheets having integral thermoplastic adhesive strips molded along the lateral edges are produced using a manufacturing method where the strips are applied prior to vulcanization of the rubber sheeting . the factory applied adhesive strip is non - tacky and dry but is activated by heat to securely bond the ethylene - propylene rubber sheets together in an overlap splicing procedure . a method of using the integral adhesive rubber sheeting for single - ply rubber roofing membrane or pond liners is also disclosed . instantaneous attainment of maximum seam strength , water tightness and consistency of the seams are advantages over conventional solvent - based adhesive methods .

one piece , molded , snap - fit roller chain cap of polymer material can be removably affixed to roller chain . the cap includes a pair of legs which , when affixed to a link of the chain , straddle the side plates thereof . each of the plates and its associated leg have interlock portions . in the preferred form , the legs extend slightly below the bottom surfaces of the plates when the legs and plates are interlocked .

a biodegradable spectrally selective grow tube or tree shelter that improves the establishment of woody plant forms by reduction and / or elimination of certain biotic and abiotic stress factors . the grow tube may provide an enhanced micro climate that is humid , co 2 - replenished and promotes photosynthesis by selectively propagating photosynthetically active radiation . in addition to providing a physical barrier to wind and herbivores , certain embodiments of the grow tube can also provide protection from chemical sprays while permitting ventilation of the grow tube . various embodiments of the spectrally selective grow tube may comprise separate interior and exterior members for enhancement of the interior and exterior surface functions and that may be constructed from a biodegradeable polymer or paper - based material . the interior member can be dyed or pigmented to selectively transmit wavelengths of the visible spectrum known to promote photosynthesis , such as red light and / or blue light .

a modified polymer as result of a bulk functionalization of polyamide 46 is presented , as well as methods for synthesizing the modified polymer . this functionalization of pa 46 is performed to provide a homogenous semi - permeable polyamide 46 capable of different charges and different porosities with particles of nanoscale size in order to replace or improve other polyamide fibers used in the textile industry , filtering processes , selective sorption , controlled release devices , phase transfer catalysts , chromatography media , biocompatible capsules , artificial skins , organs , bone void repair as well as in cell bioreactors and incubators , dental implements , medical devices , clothing , detectors , perfusion devices , in regenerative medicine , and fuel cells .

a new method for making polymeric systems for the sustained release of macromolecular drugs is described . the method consists of mixing drug and polymer , e . g . ethylene - vinyl acetate copolymer powders below the glass transition temperature of the polymer , and compressing the mixture at a temperature above the glass transition point . the macromolecule is not exposed to organic solvent during the fabrication process . the sustained release and bioactivity of macromolecules is unchanged throughout the pressure casting and release processes .

a system for electrostatically cleaning surfaces includes an electrostatically chargeable brush , having conductive polymer bristles , moveably disposed adjacent to a solid surface to be cleaned . the system also includes an actuator , configured to linearly move a solid element toward and through sliding contact along the solid surface , the brush being positioned to contact at least one of the solid surface and the solid element prior to the sliding contact , to electrostatically remove dust and the like therefrom .

the present invention provides for an apparatus and method to manufacture optical fiber in a way that produces controlled and patterned diffusion of optical radiation along its length . the novelty of the described invention is that the patterns of diffusion are produced at the time the optical fiber is manufactured . the “ in - line ” manufacturing method avoids the need for post - production treatment of the fiber , which makes the process highly efficient and economical . light diffusing optical fibers of significant length can be produced . several manufacturing configurations to achieve the desired effects and their inclusion in the fiber production process are described . the processes can be configured to process optical fibers constructed from a wide variety of known glass , polymeric or other materials . the partially diffusing optical fibers of this invention have applications ranging from illuminated fabrics and toys and to lighting systems and medical instruments . a distributed sensor comprising a light detector coupled to a partially diffusing fiber is also disclosed .

a reusable grid system and method for in place cast forming a monolithic roof covering for a sloped roof , the roof covering having the stepped and segmented appearance of a tiled roof . the grid system includes a plurality of horizontally disposed dam bars and transversly disposed spacer bars which , when removably assembled atop a sloped roof , are adapted to retain monolithic poured and scraped plastic uncured concrete or the like so as to have an exposed surface which substantially duplicates a conventional tile roof after curing and removal of the grid system . the cured roof covering is monolithic from one eave to peak to the other eave and may include foam - filled cavities for thermal insulation and weight reduction , longitudinal segmented elastomer - filled expansion joints , formed eaves with gutter connecting means and molded edges .

a sanitary wrapping for covering the handles of shopping carts and the like is provided . the wrapping may be provided either in the form of a portable wrapping which can be carried from store to store by the individual shopper and attached to the shopping cart handles in the store by various adhesive arrangements along the edges or as disposable or throwaway coverings obtained and used in each store . the preferred fastening means takes the form of so - called velcro ® fastened wrappers . various improvements of the basic tubular sanitary protection can be provided , including the use of flaps on the ends to cover more of the handle and sides of the shopping cart , plus slits in the structure of the handle covering so it can be adapted to handles of various lengths . the sanitary wrapping can also take the form of a paper or light plastic wrapping which can be dispensed from a dispenser provided near the storage place on the premises of a store for shopping carts . the customer can withdraw the protectors one at a time from such dispenser . strips of individual sanitary wrappings can be made in several different ways and several variations of the strips can also be used , including the use of flaps extending from the sides for shielding the sides of the cart as well . the sanitary wrapping may also incorporate an inner removable and disposable secondary shield layer .

methods and systems for processing waste materials and for manufacturing composite materials are disclosed herein . according to some embodiments , the heterogeneous waste includes a plastic component and a non - plastic component , and the non - plastic component includes a plurality of pieces of waste . the heterogeneous waste is heated to melt at least a portion of said plastic component and reducing a volume of said heterogeneous waste , and then mixed until at least some said pieces are each encapsulated by the melted plastic component . upon cooling , the mixture optionally sets into a composite material . the presently disclosed invention does not require pre - sorting of the heterogeneous waste and is operative to process “ as is ” waste . optionally , the waste is pre - sorted . exemplary uses for the composite material include but are not limited to flooring sheets , construction bricks , thermal insulation , acoustic walls , road paving materials , road beds , ballistic shields shock absorbing flooring , artificial islands , artificial reefs , and marine docks .

an apparatus used in agriculture and more specifically to an apparatus for removing the plastic film cover from raised plant beds in which the edges thereof are tucked under soil placed in overlying relation to the downwardly inclined side edges of the plastic film thereby enabling separation of the plastic film from the plant bed after the plants have matured and the crop harvested from the plants so that the plastic film can be removed and appropriate cultivation and reshaping of the plant beds may be more effectively accomplished with the apparatus of the present invention materially reducing the time and labor required in removing the plastic film for disposal or recycling .

the present invention relates to a process for the manufacture of composite materials having lignocellulosic fibres dispersed in a thermoplastic matrix , while generally maintaining an average fibre length not below 0 . 2 mm . the process comprises defibrillation of the lignocellulosic fibres using a mixer and at a temperature less than the decomposition temperature of the fibres in order to separate the fibres and generate microfibres , crofêbres , followed by dispersion of the fibres in the thermoplastic matrix by mechanical mixing to get the moldable thermoplastic composition , followed by injection , compression , extrusion or compression injection molding of said composition . the process produces high performance composite materials having a tensile strength not less than about 55 mpa , a flexural strength not less than about 80 mpa , a stiffness not less than about 2 gpa , notched impact strength not less than about 20 j / m , and un - notched impact strength not less than about 100 j / m . the composite materials of the present invention are well - suited for use in automotive , aerospace , electronic , furniture , sports articles , upholstery and other structural applications .

an improved bone cement is comprised of a particulate biocompatible calcium phosphate ceramic and particulate resorbable calcium salt dispersed in a cross - linked biodegradable polyester matrix . the polymer / salt - particle composite exhibits good biomechanical strength / modulus characteristics with surgically acceptable cure times . when used for sustained release of biologically active agents in a physiological environment , controlled release of biological agents that are mixed into the composite can be achieved as the cement biodegrades . when used for bone / implant fixation , or as a filler or cement for bone repair , gradual biodegradation of the cement composite permits , under suitable circumstances , evantual replacement of the cement with developing bone tissue .

the present invention relates to polymeric compositions useful in the manufacture of biocompatible medical devices . more particularly , the present invention relates to certain cationic random copolymers capable of polymerization to form polymeric compositions having desirable physical characteristics useful in the manufacture of ophthalmic devices . such properties include the ability to extract the polymerized medical devices with water . this avoids the use of organic solvents as is typical in the art . the polymer compositions comprise polymerized siloxane prepolymer containing pendant cationic and polymerizable groups .

polymer - metal ion composites and methods are provided for reversibly binding target compounds using such composites . broadly , the composites comprise an amorphous polymer matrix having a plurality of channels with metal ion - ligand complexes immobilized therein . the composites are formed by polymerizing a polymeric moiety with a metal complex template in the presence of a solvent . the template is formed of a metal ion having a ligand bonded thereto as well as to polymer matrix . the metal ion and ligand are selected to yield a composite having a particular chemical and / or physical environment around the metal sites , depending upon the desired end use . preferred metal ions include ions of the transition metals . the composites can be contacted with target compounds for reversibly binding the compounds . exemplary compounds include those selected from the group consisting of oxygen , carbon monoxide , carbon dioxide , compounds having an atom of p , s , or n , and mixtures thereof . the compound can be released from the composites at the desired time and location by heating the compound - containing composite .

a disposable package comprising a plastic container secured to plastic protective and support members so that the container may be supported in a vertical position during shipment and commercial storage and in a horizontal position , such as refrigerator shelf , for consumer use . in the preferred embodiment , the container contains a desired quantity of beer equal to a conventional case thereof . the container is provided with plastic dispensing apparatus having flow permitting apparatus movable between at least two positions so that in the first position there is no passageway between the fluid inside the container and the outside of the container and in a second position wherein the fluid in the container may be readily dispensed in separate portions over a period of time without degradation of the quality of the remaining portions of the fluid in the container . a self - generating pressure applying pouch is located within the container so as to maintain the pressure therein within a desired range of pressures so as to maintain the quality of the fluid and ensure that substantially all of the fluid is dispensed from the container . flow control apparatus is also provided to control the rate at which fluid is dispensed from the container .

an automatic production apparatus for processing semiconductor wafers which include a rotor rotatable about a substantially horizontal axis where the rotor includes a removable carrier capable of holding a plurality of semiconductor wafers or glass photomask plates and a plastic - coated bar for retaining the semiconductor wafers in the carrier when inverted at low rpm &# 39 ; s and a plurality of spray nozzles for providing the processing medium and a recessed drain for removing the expended processing medium . a timing device sequentially controls the processing functions and structure is provided to accomplish these functions .

a composition and methods for use in oilfield waterflood systems are disclosed . the composition is comprised of a phosphonate , a copolymer , and a permanganate and is effective at inhibiting the corrosion of metallic systems in petroleum oilfields caused by chlorine dioxide . methods of use of phosphonate and permanganate alone are also disclosed . chlorine dioxide is used in oilfield waterflood systems to control sulfides and sulfate reducing bacteria . however , chlorine dioxide is highly corrovive to the metallic components in the processing equipment of an oilfield system . the most effective system currently used to inhibit corrosion caused by chlorine dioxide comprises chromates . however , chromates are highly toxic and their use throughout the country is becoming increasingly restricted . the use of a composition comprised of 1 - hydroxyethylidene diphosphonic acid , a compolymer comprised of acrylic acid / allyl hydroxy propyl sulfonate ether and potassium permanganate has proved to be more effective than chromates as a chlorine dioxide corrosion inhibitor without the serious toxicological effects caused by the use of chromates .

an improved oil tank for storing hydraulic fluid and the hydraulically - powered system is fabricated from a polymeric material which is resistant to chemical breakdown from oil . the tank is constructed in a manner which facilitates internal circulation of hydraulic oil during use . the novel configuration of the tank lends itself to inexpensive fabrication through a rotational molding process . the tank is lightweight , inexpensive to manufacture , and is particularly advantageous for use in vehicle - mounted hydraulic drive systems .

a method is provided for carrying out depolymerization of a polymer containing electrophilic linkages in the presence of a catalyst and a nucleophilic reagent , wherein production of undesirable byproducts resulting from polymer degradation is minimized . the reaction can be carried out at a temperature of 80 ° c . or less , and generally involves the use of an organic , nonmetallic catalyst , thereby ensuring that the depolymerization product are substantially free of metal contaminants . in an exemplary depolymerization method , the catalyst is a carbene compound such as an n - heterocyclic carbene , or is a precursor to a carbene compound . the method provides an important alternative to current recycling techniques such as those used in the degradation of polyesters , polyamides , and the like .

novel organic compositions for removing dyes from the surface of polymeric fibers are disclosed . the method for dye removal from the surface of fibers includes contacting the fibers with a non - aqueous ester stripping composition preferably containing at least one cyclic ester and optionally containing a surfactant , an alcohol , or both . the process of the present invention is especially useful for removing color from dyed polyamide fibers as part of a recycling process for such materials .

a disposable container suitable for retaining liquids comprises two opposed container sections , each having a peripheral ring like flange about a recess with the flanges being sealed therebetween . the recesses of the opposed container sections define a common central cavity and the flanges include a throat opening into said cavity through which product within the cavity can be dispensed . the throat is at least partially defined by the opposed container flanges and each container section is of a thermoformable plastic material . these container sections are originally formed from flat strip packaging material having diecut side edges with the strip defining individual container body sections . a tapered neck portion of each body section accommodates dispensing of the contents and preferably a hot melt adhesive secures the opposed container sections . the plastic containers are formed by intermittently advancing , in timed sequence , two strips through separate thermoforming operations where each strip is shaped to form a series of half containers and thereafter the strips are married and secured for subsequent operations . the invention also includes an apparatus and process for forming , filling and sealing the containers by advancing the packaging material through a number of stations along a predetermined path . the formed container is shaped to reduce inadvertent tipping thereof when supported in a free - standing disposition .

a collapsible bowl made of pliable materials that can be flattened or configured into an easily disposable or reusable bowl . a flexible collar is also provided which used with a sealable plastic baggy produces a collapsible bowl .

a conveyor system having first second and third stations and a return conveyor in communication with and linking the first and third stations : the first station has a device to selectively feed pallets , one at a time , from the return conveyor to a position underneath an unpackaged work piece disposed on the first station portion of the conveyor system and help position the pallet with the work piece on top of it on to another part of the first station portion of the conveyor system , which conveys the pallet and the work piece to the second station where packaging of the workpiece is carried out , for example , shrinking a plastic sheet about the work piece . another part of the conveyor system conveys the packaged work piece to the third station where a device removes the pallet from the packaged work piece , places the packaged work piece on another part of the third station portion of the conveyor and places the pallet on the return conveyor for return to the first station .

a magnetic particle and fabrication method thereof . the magnetic particle comprises a polymer core , a magnetic material layer covering the polymer core , and a silicon containing layer covering the magnetic material layer . in addition , the magnetic particle may further comprise a coupling agent on the silicon containing layer , and an active molecule connected to the coupling agent . the magnetic particles provide controllable size , uniform diameter distribution , high magnetization , improved storage stability , and modified surface for targeting biomolecules for biomaterial separation and environmental analysis .

processes for preparing carbamatoorganosilanes from aminoorganosilanes , ureas and alcohols . these compounds are useful for surface modification of inorganic and organic materials , as adhesion promoters between inorganic materials and organic polymers , as crosslinking agents for the moisture - curing of polymers , for pu sealants , in the coating and adhesive sector , and for the production of biologically active products , such as insecticides and herbicides .

a hybrid rocket motor is manufactured by photopolymerizing the solid fuel grain in a stereolithography method , wherein fuel grains in a plastic matrix are deposited in layers for building a solid fuel rocket body in three dimensions for improved performance and for a compact design , the hybrid rocket motor including buried radial channels for defining a desired burn profile including the oxidizer to fuel burn ratio .

a plastic transmission filter composed of mating upper and lower shells of synthetic resin material with at least one set of registering weld posts extending between inner surfaces of the upper and lower shells ; a fluid pervious centertube interposed between the mating shells around the weld posts , and a filter material wrapped around the centertube to form a bag filter . the filter assembly can be welded together in a single vibration welding operation and provides enhanced flow of transmission fluid by avoiding flow restrictions caused by prior art reinforcement poles .

a gun for mixing and dispensing plural component plastic materials , and for example as polyurethane foam , is provided with a purging device operable independently of the foam mixing and dispensing mechanism . the purging device comprises a rod , normally positioned rearwardly of the foam component inlet orifices and mixing chamber , the rod being selectively actuable independently of the foam mixing and dispensing operations , by a two way air cylinder controlled by the gun operator .

a capacitive sensor module with a sensor electrode which is used to detect the entry of an object into a space ahead of the sensor electrode , wherein the sensor electrode is formed from a wire . parallel to the sensor electrode , auxiliary electrodes extend within a plastic carrier that possesses recesses to receive the sensor electrode and the auxiliary electrodes and partially surrounds them along their circumference . the sensor electrodes can be pressed into the plastic carrier by overcoming an elastic forming force and are held within their recesses by the elastic reshaping process .

the invention provides novel dental enamel inspired materials for biomedical and dental applications . the materials are apatite - like calcium phosphate complexes and may comprise apatite , octacalcium phosphate crystals , or mixtures thereof . in one embodiment , the materials are mixtures of crystals of apatite and its precursor , octacalcium phosphate , nucleated on a titanium surface . they are prepared using a chemical process leading to the formation of biological apatite which is similar to that found in natural bone and teeth . in one embodiment , the materials are prepared by placing a titanium substrate in a supersaturated calcifying solution containing native or purified recombinant amelogenins . the presence of the amelogenins modulates apatite crystal growth to mimic in vivo apatite crystal formation . applications for the materials include , without limitation , dental tissue replacement , orthopeadic implants for bone repair , and coatings for improving the biocompatibility and bone regeneration capability of currently available implants or medical devices made of metallic , polymeric , ceramic or composite materials .

the present invention is a method and apparatus for cooling a frozen comestible plasticizer apparatus with a heat exchanger pan over a freezer , protecting the freezer from extraneous matter filling in , while providing a cool circulatable environment to cool the auger and cup of the apparatus to help avoid bacterial growth and minimize the need for cleaning of the apparatus .

optical machine readable code symbols for marking objects , preferably recyclable plastic bottles , are so constructed that they possess an axis of symmetry . the code symbols can additionally be rotated by predetermined angles from a basic configuration in order to be able to represent a plurality of information pieces . the symmetric code symbols are easily recognized and evaluated under difficult conditions such as exist , for example , in a bottle filling operation .

a visor rod assembly includes a polymeric torque device having an elongated bore which includes at least one detent formed on the inner radius thereof and which receives an elongated visor pivot rod having a noncircular cross section . a visor with such an assembly can slide along the pivot rod to a variety of selected use positions .

the specification relates to certain imido - oxamide - type compounds and derivatives thereof which are useful for preventing metal catalyzed oxidative degradation of polyolefins . the specification also relates to olefin homopolymer and copolymer compositions containing such compounds and derivatives thereof and to a method for enhancing the resistance of olefin homopolymers and copolymers against metal - catalyzed oxidative degradation by incorporating these compounds therein .

a comb - like surfactant polymer for changing the surface properties of biomaterials is described . the surfactant polymer comprises a polymeric backbone of repeating monomeric units having functional groups for chemically attaching to side chains , a plurality of hydrophobic side chains attached to the backbone via the functional groups and a plurality of hydrophilic side chains chemically attached via functional groups to the polymeric backbone . the hydrophilic side chains providing anti - thrombogenic properties to the surfactant . an antimicrobial agent selectively attached to some hydrophilic side chains thereby providing additional antimicrobial properties to the surfactant . the surfactant polymer may be applied to the surface of medical devices to reduce the surfaces thrombogenicity and decrease the number of microorganisms on the surface .

the invention relates to a microencapsulated emulsion a drug - dispersed oil core surrounded by a water - insoluble capsule material . the capsule material is made up of a polysaccharide which has metal chelating capacity , a biocompatible and water - soluble polymer for improving the physical properties of the capsule material , and emulsifying agents . the ratio of polysaccharide to polymer in the capsule material is at least capsule material , and emulsifying agents . the ratio of polysaccharide to polymer in the capsule material is at least 0 . 25 .

the invention is to articles made from extracellular matrix sheets that encase biodegradable polymeric material . methods of healing wounds or regenerating tissue at sites of defect by placing said articles in mammals are claimed . the biodegradable polymer can change quality upon contact with a physiological parameter such as temperature or ph that causes , for example , a liquid polymer to gel or harden . the degradation of the polymer can be controlled to suit a tissue regeneration or wound healing time course . additional components such as proteins , cells and drugs can be added to the biopolymer composition .

the present invention relates to a metal mold for producing a synthetic resin molded product , particularly a thermoplastic resin molded product , which is characterized by comprising : a first mold , a sliding mold that is allowed to slide over the entire outer circumferential face or on a portion of said first mold , a second mold having a parting face that is capable of contacting the face of the outer circumference of said sliding mold , and a mechanical clamping mechanism that makes the outer circumferential portion of the said sliding mold mechanically coupled to said second mold , wherein said sliding mold has a sliding direction that is the same as the opening and closing direction of the two molds , that is , the first mold and the second mold , and the sliding face between the first mold and the sliding mold is located inside the outer circumferential line , of a plane projection figure in the opening and closing direction of the metal mold , of a synthetic resin molded product which is molded by the metal mold for producing a synthetic resin molded product . when the metal mold of the present invention is used for producing a synthetic resin molded product , it becomes possible to eliminate burrs being produced along the outer circumferential line , of a plane projection figure in the opening and closing direction of the metal mold , of the synthetic resin molded product , thereby making it possible to produce a product with good appearance .

the invention relates to a method for producing objects and object parts formed by an assembly comprising at least two plastic parts , which can move in relation to one another with at least one degree of freedom and which are provided with surfaces having at least partially complementary shapes such that , in at least one geometric configuration , they are solidly interconnected on a common surface in close , clearance - free contact the inventive method comprises the following steps : 1 ) molding of a first part by compression or injection ; 2 ) removal of the second tool , the first part remaining solidly connected to the first tool which serves as a piece of support equipment or is installed on a piece of support equipment ; 3 ) compression molding of the second part using the whole of the first part which is integral to the support equipment and a third tool ; 4 ) removal of the first support tool and the third tool and extraction of the assembly thus formed .

improved , manually - operable , adjusting mechanisms for click - type , adjustable torque wrenches which include manually - engageable , resilient , plastic , tubular handgrips slidably engaged about the rear end portions of elongate , tubular , metal wrench lever arms and which are shiftable longitudinally from normal , forward positions in rotary - driving engagement with the arms to actuated rear positions out of rotary - driving engagement with the arm . the invention resides in an improved locking mechanism releaseably locking the grip in rotary - driving engagement with the arm when in its normal position and yieldingly permitting rotation of the grip relative to the arm when turning forces between the arm and grip exceed the shear strength of the material of which the grip is made . the locking means include a plurality of circumferentially - spaced , inside flats about the exterior of the arm and a plurality of circumferentially - spaced , outside flats about the interior of the grip normally establishing flat bearing and rotary - driving engagement with the inner flats when the grip is in its normal position . the adjacent inner flates define cam edges to engage the surfaces of the outside flats and to yieldingly expand the grip when forceably rotated relative to the arm .

a foamed plastic is cut to form a single - layer polishing pad having a desired rigidity and compressibility . a polishing surface of the polishing pad has a higher density than a mounting surface of the polishing pad . the polishing surface and the mounting surface may have different areas having different densities for achieving desired rigidity and compressibility property . furthermore , methods of making such single - layer polishing pads are also disclosed .

unsaturated heterocyclic carbonyl - containing compounds , e . g ., 2h - imidazol - 2 - ones , 2 - oxazolones and 2h , 3h - pyrrol - 2 - ones , are prepared by the anodic oxidation of saturated heterocyclic carbonyl - containing precursors of the above compounds in a c 1 - 4 alcohol or carboxylic acid solvent in the presence of a supporting electrolyte followed by dehydrosubstitution of the alkoxy - or acyloxy - substituted intermediate . the products formed may be polymerized or copolymerized with other ethylenically unsaturated monomers to prepared resins , films , etc . or they may be employed as intermediates for the preparation of various biologically active compounds .

the present invention relates to a bioresorbable scaffold for a vascular stent comprising a nitric oxide agonist and a polymer comprising a lactide , a glycolide and a lactone . the nitric oxide agonist is a statin or a hmg coa reductase inhibitor . the nitric oxide agonist may be coated on the polymer , incorporated within the polymer or chemically bonded to the polymer . the invention also relates to a method for treating atherothrombosclerotic occlusive disease of an artery comprising implanting into the artery a stent with a bioresorbable scaffold comprising a nitric oxide agonist and a polymer comprising a lactide , a glycolide and a lactone , wherein the nitric oxide agonist is exuded from or released from the bioresorbable scaffold .

provided is a fusion protein comprising a tumor necrosis factor related apoptosis inducing ligand , integrin ligands of αvβ3 and αvβ5 and a linking peptide . also provided are the expression method and simple separation and purification process for the production of the fusion protein which is soluble and has high content of the polymer , and use of the fusion protein for the manufacturing of a medicament for the treatment of tumor . the fusion protein has good tumor tissue targeting property , significantly enhanced anti - tumor effect , which can also reduce the dose of the needed protein for the target treatment effect , improve the bioavailability , reduce the treatment cost , decrease and overcome the potential toxic and side effects of the tumor necrosis factor - related apoptosis inducing ligand .

this invention provides compositions and methods for rapid separation , isolation and purification of nucleopolymers , especially nucleic acids , from biological samples using anionic exchange media . the method of the present invention can utilize commercially available strong or weak anion exchanger materials with selected solutions of known ionic strength for adsorption and elution . the medium / nucleoprotein bound complex may be optionally stored or transported , but is subsequently treated with appropriate eluents to remove any undesirable proteins , including destabilizing enzymes , and inorganic salts and the like . the partially purified complex may also be stored or transported prior to further processing . the instant method is particularly advantageous as it provides the means for rapid isolation and purification of soluble nucleic acids obtained from samples of biological fluids of comparatively large volume , allowing ease of handling and storage , and stabilizing the samples against degradation prior to analysis . it also permits the purification and identification of shorter fragments of nucleic acids from bodily fluids which , up till now , had not been identified . the method is widely useful as a means to prepare samples formats that are convenient in diagnostic analytical methods , particularly those that rely on the detection , characterization and identification of nucleic acid sequences , from body fluids .

this invention relates to a method and apparatus for diluting and activating a polymer in water . more particularly , the invention relates to the use of a stirred tank in conjunction with an aging tank that allows the polymer to uncoil or become activated in water after dilution , but prior to introduction into service .

a plastics waste processor is provided for efficiently compacting and melting plastics waste , so as to form easily disposable compact plastic units having a volume considerably smaller than the unprocessed plastics waste . the plastics waste processor has a waste containment chamber , a rotating chamber door , a jam breaker bar to facilitate opening of the door when jammed by melted plastic waste , pneumatically driven waste compaction means with plastic shedding rams , a waste containment chamber heating system , a processor temperature monitoring means , a cooling means , and a control means . further a cable and hose management system is provided for protection of moving cables and hoses , as well as a washdown system for automatic cleaning of the processor .

the invention provides a method for single - step terminal sterilization process for bio - active heparin coatings on materials and biomaterials containing heparin used in medical devices , such as catheters , tissue engineering scaffolds , or drug delivery carrier materials . this may include any medical device or implantable that could benefit from improved antithrombotic and biocompatible heparin surfaces . other relevant device examples may include heparin or a heparin derivative coated stents to reduce clotting and restenosis , dental or ophthalmological implants . these materials may comprise additional polymeric compositions such as polyethyleneimine , dextran sulfate or their modified forms . these polymers together with heparin coatings may be applied to other substrate of medical devices such as metal , ceramics or biologically derived materials .

a method and device for recovering linear polyesters , such as pet and pbt , from polyester waste of the most varied form , in a continuous manner , in which undried or not dried - through waste is melted , the polymer chains being hydrolytically degraded by adhering moisture , and in which diol , corresponding to the basic constitutional unit of the polymer , is added to the melt resulting in glycolytic degradation , and the melt so treated is further condensed to the desired degree of polymerization .

provided are polyethylene glycol drug conjugates of general formula , or and pharmaceutical compositions and a use thereof . the conjugates are formed by combining low molecular weight polyethylene glycol with 2 - 4 drug molecules . the conjugates can interact with receptor dimers or polymers , thereby improving the in vivo distribution of the drug , changing the oil and water distribution coefficient , enhancing the pharmacological activity , reducing the blood - brain barrier permeability of the drug , and improving the bioavailability of the drug .

this invention is related to the use of polyurethane based polymer as a drug delivery device to deliver biologically active compounds at a constant rate for an extended period of time and methods of manufactures thereof . the device is very biocompatible and biostable , and is useful as an implant in patients for the delivery of appropriate bioactive substances to tissues or organs . the drug delivery device for releasing one or more drugs at controlled rates for an extended period of time to produce local or systemic pharmacological effects comprises : 1 . a reservoir , said reservoir comprising ; 2 . at least one active ingredient ; and , optionally , 3 . at least one pharmaceutically acceptable carrier ; a polyurethane based polymer completely surrounding the reservoir .

a universal reusable system is provided for molding concrete or other settable fluids for use in building construction . in the subject system , apertured composite plastic panels and frames , prestressed by the presence of an array of removable and interchangeable oversized plastic plugs , are positioned and held in place by a framing system which utilizes a combination of apertured strips used as base guides and both vertical and horizontal channels , as well as dowels and plugs . the use of apertured panels and framing system provides for a reusable assembly whose dimensions can be readily set on site for each application and whose rectilinearity is maintained either by the dowel - aperture combination or by a combination of oversized plugs in adjacent members to be joined and connectors therebetween .

the present invention relates to a method and system for polymerase chain reaction , high resolution melt analysis and microfluidics , and , more specifically , to a method and system for implementing the processes of pcr and hrm on a microscale in a microfluidics chamber for certain purposes including for purposes of dna detection and / or extraction .

a process for upgrading brown coal is disclosed , including providing at least two converging surfaces defining a nip , wherein at least one of the surfaces is rollable in a direction toward the nip ; feeding the brown coal to the nip where , by the rolling action of the rollable surface , the brown coal is subjected to shearing stresses , causing attritioning of the microporous structure of the brown coal and the release of water contained in the micropores ; and continuing the shearing attritioning until the brown coal forms into a plastic mass . processes for the production of char are also disclosed utilizing as feed material pellets formed from the upgraded brown coal produced by the above process , as well as a process for recovering metal from a metal containing material .

the present invention provides a method for separating one or more selected polymer from a mixture of polymers , as well as the recycled solid polymer product produced by the present method of the invention . one method of the present invention involves dissolving a mixture of polymers in a solvent to produce a solution , then cooling the solution to a temperature at which at least one of the selected polymers precipitates in the form of a solid . the solid is then separated from the suspension before being washed in a solvent at a temperature that is higher than the dissolving temperature , in order to produce a washed solid . the washed solid is separated from the second solvent . in one variant of the method , the suspension produced in the cooling step is treated with an added solvent .