Datasets:

cwinkler

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patents_green_plastics

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the present invention relates to an airbag door for instrument panel and its manufacturing method . a passenger side airbag door for instrument panel includes a substrate with airbag opening , skin layer and foam layer , a pab door reinforcement board which covers the airbag opening is connected to the instrument panel substrate . this pab door reinforcement board is a cellulosic composite material board which is soaked by thermoplastic plastic or thermoplastic elastomer , formed through thermoforming . in present invention , the turnover and movable portion of the airbag door is lighten greatly . the airbag door with the light composite material can prevent the windshields from being broken effectively when the airbag deploys sufficiently and impacts against the windshields .

the invention relates to a locking cap made of a molded plastic material for a vessel having a neck , intended for blocking a stopper in said neck , including a wire - cap adapted for surrounding the stopper and the neck in the mounted configuration of the cap . the wire - cap includes first and second flexible tabs capable of being respectively blocked on the neck and on the stopper , said first tabs being offset relative to said second tabs in an axial direction relative to said neck . the cap also includes a ring surrounding the wire - cap for preventing access to said tabs from outside the ring . the ring and the wire - cap are designed so as to be fitted and locked together . the tabs of the wire - cap are respectively arranged at an angle in first and second openings which are formed by the mesh of the wire - cap , and in which the tabs can disappear when mounting the cap on the neck .

the invention provides a stratiform press sheet useful in laminating three - dimensional flexible printed circuits on a flat bed press , the sheet having a median conformable layer comprising a polymeric thermoplastic film ; a polymeric release layer ; a stabilizing layer made of a sheet of metal foil ; and adhesive means to bond the above components in a single , stratiform sheet . the metal foil is functional at both the conventional lower laminating temperatures and the higher temperatures approaching 600 degrees f ., and accordingly by careful selection of the other components it is possible to provide unified stratiform press pad sheets accommodating a wide range of laminating temperatures .

this invention relates to a novel group of plasticizers for polyvinyl butyral wherein the plasticizer comprises a mixture of at least one alkyl alkylaryl adipate and at least one dialkyl adipate in which the alkyl group contains 3 to 8 carbon atoms .

an integrated scrap tire pyrolysis plant can be built to process scrap tires . the recovered carbon black can be used in rubber and plastic industries . oil and gas from the pyrolysis process can further be used in the production of virgin carbon black . natural rubber is a sustainable feedstock for the manufacture of tires , making the manufacture of virgin carbon black partially sustainable . a very low pah carbon black can be produced by limiting the exit temperature of carbon black and tail gas prior to leaving the reaction chamber .

the invention relates to a polymeric product having domains of injected ingredients therein . a tire having precisely placed and oriented injected ingredients is described . the nature of the injected components , and their density , as well as their placement and orientation , are determined based on tire property enhancements desired . fibers may be injected into the tread shoulder area of an uncured tire to provide abrasion resistance and traction in the cured tire . high tack rubbers or adhesives may be injected into the central tread region of a cured tire to enhance traction and grip .

a cushioned shipping assembly includes a carton and foam inserts to support a product shipped by a supplier , which elements are successively returned by an end user to be reused in the same or other shipping assembly , while various components are recycled as they become spent . in some embodiments , the carton collapses to a diminished size for return . a resource center reroutes or refurbishes the components , recycling aged or spend pieces . on - premises pelletizing of reclaimed polymer provides a more efficient , environmentally clean system . spent inserts of identified polymer may be diverted to users of specific resins .

amorphous polyethylene terephthalate can be polycondensed in the solid phase to a higher molecular weight product by a continuous process involving preheating the polymer under forced motion , at least partially crystallizing the preheated polymer in a fixed bed , and polycondensing the polymer in a forced motion reactor at temperatures in the range of 220 ° to 245 ° c .

a multi - layered thermoplastic polyolefin film having an improved combination of physical characteristics is disclosed . in particular , the multi - layered film evidences an improved combination of elongation , oxygen transmission and heat shrinkability . preferred five layer embodiments of the film comprises a core layer of either a low density polyethylene homopolymer or an ethylene acetate copolymer or a blend of an ethylene vinyl acetate copolymer with a linear low density polyethylene ; two adjacent intermediate layers of a very low density polyethylene with a density of less than 0 . 900 gms / ccm , and two surface layers of an ethylene vinyl acetate copolymer .

a method of securing a loose polymeric resilient liner to a rigid pipe to permit flaring of the polymeric liner to form a flange joint interface . apparatus to secure the resilient liner while the polymer liner is flared is also disclosed .

the present invention provides a loop - type microfluidic system , and the microfluid therein could be driven to move around the loop - channel repeatedly by the air comes from the air holes and through the driving conduits . in order to process the polymerase chain reaction , the microfluid should bear the temperature changes for three times . hence , plural temperature controllers are utilized to adjust the temperatures of the sections constituting the loop - channel . moreover , the times of cycles may be determined based on the desired times of reactions . the present invention could also increase or decrease the number of the air holes , the driving conduits and the temperature controllers to adjust the times of temperature changes according to the demands of various biochemical reactions .

a multilayered polymeric preform or container is disclosed wherein the blow temperatures of each polymer in a preform is controlled by the addition of a predetermined selected amount of a fast heat up additive such that each polymer layer blows at the same relative period of time to prepare the container .

disclosed is super water absorbent polymers applied to contain water , and the polymers may further collocate with water absorbent cotton materials to accelerate water absorbent rates . the described water absorbent materials are combined with solid hydrogen fuel to complete a stable hydrogen supply device . performance of the hydrogen supply device is not effected by inverting or tilting thereof . even if inverting or tilting the device , the water contained in the water absorbent materials does not flow out from the device . as such , the mea film in the fuel cell connected to the hydrogen supply device will not blocked by the water , thereby avoiding the fuel cell performance degradation even breakdown .

there is provided a multiple - component tampon applicator formed from at least three separate components . a fingergrip having a reduced cross - section as compared to that of the barrel may be formed such that it is a separate component or is integrally formed with a barrel component . the reduced cross - section fingergrip provides exceptional grippability to the user . the multiple components may be formed from materials including , for example , biopolymer including starches and proteins , cardboard , heat shrink plastic , paper slurry , plastic , plastic tubing , pulp slurry , pulp - molded paper , or any combinations thereof . prior to assembly of the applicator and prior to loading the barrel component with an absorbent pledget , petals may be formed on the insertion end of the barrel using existing processes and equipment . alternatively , a separate insertion tip component having petals may be formed . this separate component may then be connected to the barrel component either before or after an absorbent pledget is loaded into the barrel component .

in transfer molding thermosetting polymeric materials , a first preform of first thermosetting polymeric material having a volume substantially equal to the volume of the die cavities is placed in the transfer chamber adjacent the runners . a second preform of second thermosetting polymeric material cheaper than the first polymeric material is placed in the transfer chamber above the first preform . the transfer chamber is pressurized and the second preform is deformed and pressurizes and deforms the first preform and causes the first thermosetting polymeric material to flow through the runners into the die cavities . after curing , the molded articles consisting of first thermosetting polymeric material are removed from the die cavity , and scrap cull and runner consisting substantially of cheap second thermosetting polymeric material are removed from the mold runners and the bottom of the transfer chamber . thus , considerable economies are effected . the material of the second preform is selected for certain physical properties . various means are shown for loading the transfer chamber .

the efficient production of ethanol from low - cost biomass has become increasingly important in making ethanol competitive with gasoline and decreasing the united states &# 39 ; dependence on foreign oil . for example , to reduce the cost of transporting biomass to ethanol production facilities , mobile systems for producing ethanol from biomass are provided . also provided are small - scale ethanol production facilities . for example , instead of transporting biomass to the production facility , the facility is transported to the biomass or is located nearby the source of the biomass . the ethanol production facilities or components thereof may be transported via land , water , or air . production of other products , such as hydrocarbons , natural gas , hydrogen gas , plastics , polymers , and proteins , can also be made by the methods and facilities . any product described herein can be made in finished form or un - finished form and moved , e . g ., to a fixed facility , e . g ., fixed production facility .

a rigid snap - on plastic cover for a sun - damaged vinyl - covered dashboard pad is installed in an automobile without loosening or removing the dashboard pad from a dashboard substructure . the snap - on cover is made by draping a preheated softened polycarbonate sheet over a mold positioned on a narrowed support . a partial vacuum is produced in the region covered by the draped polycarbonate material , causing it to be drawn against the mold for support and to conform thereto . a skirt portion of the polycarbonate material from the support is severed after the vacuum is released , and the forward portion of the hardened polycarbonate is lifted over the mold , forcing any breakage of the &# 34 ; back draft &# 34 ; portion of the polycarbonate to occur in forward corner locations that will not be visable when the snap - on cover is installed in the automobile . the peripheral portions of the polycarbonate material are cut cleanly away and the outer surface is spray painted . the cover then is snapped into position over the vinyl covered dashboard pad in the automobile , after applying glue to the inner surface .

a cartilaginous structural member for use in penile reconstruction , for the correction of developmental defects , postoperative reconstruction , and for reconstructive preprosthetic surgery . the cartilaginous structural member comprise of live cells seeded onto pre - formed shaped structure which may be biodegradable . the live cells may comprise chondrocyte and the cartilaginous structural member for use in reconstructive surgery may be constructed of polyglycolic acid . the implant structure is applicable to use for the regeneration and reconstruction or augmentation of semirigid members of the body such as the penis , nose , ear and locations which naturally has cartilage . further , the cartilaginous structural member may be used in plastic surgery such as , for example , breast augmentation or pectoral augmentation . the cartilaginous structural member may be a composite cartilaginous structural member comprising additional anchoring and strengthening elements for anchoring or changing the structural strength of said composite cartilaginous structural member .

non - pvc multi - layer film containing an outer layer , a supporting layer together with at least one interposed central layer , characterized in that the outer and supporting layers contain polymers having vicat softening temperatures of above approximately 121 ° c . and that at least one central layer contains polymers having softening temperatures of below approximately 70 ° c . the non - pvc multi - layer film is particularly suitable for the production of medical bags , in particular multi - chamber bags , as the materials of the individual layers are selected in such a manner that the film is transparent and flexible , but in particular also heat - sterilizable , fusible and heat sealable . the film is moreover completely recyclable .

a non - metallic element system is provided as part of a downhole tool that can effectively seal or pack - off an annulus under elevated temperatures . the element system can also resist high differential pressures without sacrificing performance or suffering mechanical degradation , and is considerably faster to drill - up than a conventional element system . in one aspect , the composite material comprises an epoxy blend reinforced with glass fibers stacked layer upon layer at about 30 to about 70 degrees . in another aspect , a mandrel is formed of a non - metallic polymeric composite material . a downhole tool , such as a bridge plug , frac - plug , or packer , is also provided . the tool comprises a support ring having one or more wedges , an expansion ring , and a sealing member positioned with the expansion ring .

a method for producing a bioactive bone cement and a bone cement kit for anchoring artificial joints and for filling out bone defects . the method avoids polymerization - linked by - products and disadvantageous effects , while at the same time providing the bone cement with long - term stability . the inventive method uses a monomer - free polymethylmethacrylate , which is mixed with a suitable non - toxic solvent , and a bioactive , vitreous - crystalline material with a particle size ranging from & gt ; 20 to 200 μm , having 15 – 45 wt . % cao , 40 – 45 wt . % p 2 o 5 , 10 – 40 wt . % zro 2 and 0 . 7 – 3 . 5 wt . % fluoride , having apatite and calcium zircon phosphate as main crystal phases and a glass phase as an auxiliary component until a flowable mixture is obtained . the invention also relates to a bone cement kit having said components .

the invention concerns au complexes of the type ] which are able to both maintain the antitumor properties and the lack of nephrotoxic side - effects of the previously reported au - dithiocarbamato complexes , together with an improved bioavailability through the peptide - mediated cellular internalization . the au complexes described have shown a significant biological activity on human tumor cell lines and , thus , they can be advantageously used as antineoplastic agents . the preparation method and use for the treatment of tumor pathologies of the au complexes of the invention are further described .

bioactive agents are delivered to a body site in need of the same by providing a first aliquot portion of a reaction mixture which includes an aldehydic polymer solution , and a second aliquot portion of a reaction which includes a cross - linking hydrazide and a bioactive agent . the first and second aliquot portions may be mixed to form the reaction mixture thereof . the thus formed reaction mixture may then be installed at the body site whereby the reaction mixture is allowed to solidify in situ within about 1 to 10 minutes into a reaction product comprised of a hydrazide cross - linked oxidized aldehydic polymer matrix with the bioactive agent entrapped therein .

an assay element is described including recognition ligands adapted for binding to carcinoembryonic antigen bound to a film on a single mode planar optical waveguide , the film from the group of a membrane , a polymerized bilayer membrane , and a self - assembled monolayer containing polyethylene glycol or polypropylene glycol groups therein and an assay process for detecting the presence of cea is described including injecting a possible cea - containing sample into a sensor cell including the assay element , maintaining the sample within the sensor cell for time sufficient for binding to occur between cea present within the sample and the recognition ligands , injecting a solution including a reporter ligand into the sensor cell ; and , interrogating the sample within the sensor cell with excitation light from the waveguide , the excitation light provided by an evanescent field of the single mode penetrating into the biological target - containing sample to a distance of less than about 200 nanometers from the waveguide thereby exciting any bound reporter ligand within a distance of less than about 200 nanometers from the waveguide and resulting in a detectable signal .

a substrate for culturing cells that includes at least one fiber scaffold adapted to be contained within a disposable or non - disposable bioreactor , wherein the fiber scaffold further includes polymer fibers that have been created by electrospinning , and wherein the orientation of the fibers in the scaffold relative to one another is generally parallel , random , or both .

a product having a textured surface thereon is disclosed wherein the textured surface is obtained by relieving the stress in pre - stressed polymeric chips that have been distributed as a single layer throughout a polymeric layer superimposed on a substrate .

the claimed invention uses activated carbon fibers that incorporate porous carbon with a suitable pore size to maximize capacitance . the porous carbon material is prepared using a template , followed by incorporation into a matrix polymer and electrospinning of the mixture . subsequent thermal treatments retain the fiber form , and a composite carbon fiber incorporating templated porous carbon is attained . the resulting electrode is binder free and 100 % electrochemically active . energy densities up to 41 wh / kg in energy density 1 . 5 kw / kg in power density have been achieved .

biodegradable and biocompatible polymeric hydrogels based on the mixtures of poly and poly macromers , and methods for their preparation and use , are disclosed . the polymerization may be carried out in situ on organs or tissues or outside the body . applications for such biocompatible crosslinked hydrogels include prevention of post - operative adhesions , surgical sealants , embolic therapies , controlled delivery of drugs , coating of medical devices such as vascular grafts , wound dressings and other medical applications .

this invention relates primarily to organofunctional monomers , predominantly dimethacrylates and / or diacrylates containing one or more ( predominantly two carboxyl groups , with moieties that provide sufficient affinity with water to allow any desired amount of water and / or miscible fugitive solvents to be mixed homogeneously with these monomers and formulations containing them . the activity of water in the monomer formulations can be adjusted so that it is equal to the water activity in biological tissues . this promotes biocompatibility and enhances the adhesive characteristics of polymers prepared from these formulations . probability statistics are disclosed that optimize the compositions of polymer reaction products . also disclosed are novel , dual - purpose synthesis reaction monomers , catalysts , stabilizers , polymerization initiators and / or cophotoinitiators that have solubility and surface - activity characteristics such that they will not become separated by partitioning during penetration of hydrated layers on or in the substrate adherends . these formulations may be used for light - cured or chemical - cured bonding to soft or hard tissues , metal , porcelain , ceramic or other surfaces . a potential application for the composition is the holding together , by an overlying layer of resulting polymer , tissues adjacent to incisions and wounds . the polymerized composition might replace suturing , and allow for the healing of soft tissues .

this invention relates to a heat - shrinkable film consisting essentially of a blend of 99 . 5 - 98 . 5 weight % of linear low or medium density polyethylene and 0 . 5 - 1 . 5 weight % of one or more copolymers of ethylene with a monomer selected from vinyl acetate and acrylic acids or esters , where said film has been cross - linked to the degree induced by an irradiation dosage of about 1 to 5 megarads .

continuous process for manufacturing , in a cold press , plastic laminates with copper laminae and intermediate layers of prepreg , by multicomposition bands with copper laminae and bands of prepreg continuously fed in from reels which , placed one upon another , pass through the press , endothermic heating being provided by circulating electric current in the fractions of copper laminae which remain pressed in the press during cyclic closing stages .

a method of a preparing double - layer antimicrobial coating comprises : placing a plastic substrate into a pvd vacuum equipment for a vacuum process ; rinsing and activating the substrate when the vacuum level reaches 10 − 2 ; coating a metal film onto the activated substrate by the vacuum process ; spraying an antimicrobial intermediate coating onto the metal film ; and then coating an antimicrobial metal film by pvd to obtain a double - layer antimicrobial layer . the coating has two antimicrobial layers , and includes bores because the density of the coated film layer produced by pvd is low , so that the antimicrobial agent of the antimicrobial intermediate coating can pass through the bores and move to the surface of the coating and the surface of the antimicrobial coating , so as to kill the bacteria or suppress their grown . the method is very suitable for the sanitary , electronics , electrical appliances and the automobile industry .

an apparatus for extruding plastic materials in multilayer tubular form includes an annular extrusion die having an annular extrusion orifice and annular passage for conveying plastic material to the extrusion orifice , the die also having at least one arcuate passage extending at least partly around the annular passage such that the arcuate passage completely surrounds , or where there is more than one arcuate passage in combination completely surround , the annular passage inwardly or outwardly thereof and is or are in communication therewith . a melt stream of plastic material is encapsulated with a different plastic material in a circumferentially continuous manner to produce an encapsulated melt stream , and at least a portion of the encapsulated melt stream is fed to an arcuate passage to cause at least partially encapsulated plastic material to pass into the annular passage with subsequent extrusion in multilayer tubular form from the annular die orifice .

an aquarium water treatment module comprising a tubule formed of biologically acceptable thermoplastic material . the tubule has a specific gravity proximate that of water . the tubule can be inserted within a filter device such as an internal aquarium filter or a filter cartridge . the tubule is light in weight so that it can disperse within the filter . the tubule supports the propagation of organisms useful in the biological filtration of the water .

a tubular intraluminal prosthesis includes a ptfe or eptfe tubular structure such as a graft , and a tubular diametrically deformable stent circumferentially surrounding the tubular structure . the diametrically deformable stent includes a polymeric coating which allows for attachment to the tubular graft structure and enhances the biocompatibility and integrity of the composite prosthesis .

the present invention relates to wood that is reinforced with a fiber - reinforced thermoplastic composite that contains a plurality of substantially parallel continuous fibers impregnated with thermoplastic polymer having the following structural units : where z is s or o , and z ′ is s , o , n - alkyl or nh the invention is useful in a variety of applications including glue - laminated structures , laminated veneer lumber , reinforced i - beams , parallel strand lumber , reinforced particle board , and ladders . the use of a thermoplastic polyurethane , particularly the high tg thermoplastic polyurethane as the impregnating resin provides a means of recycling and reusing the reinforced lumber , as well as shaping the composite in ways that would be impossible using conventional fibe - reinforced thermoset composites .

the present invention relates to provide an anticorrosive layer having a biomimetic surface nano microstructure and the application . the anticorrosive layer comprises a polymer and a nano - particle . both of the nano - particle and the biomimetic surface nano microstructure are required for the anticorrosive layer to effectively enhance the anticorrosive performance .

the present invention relates to sandwich panels used as aircraft interior parts . in addition to provide a finishing function , the sandwich panels need to have certain mechanical properties and have sufficient fire resistance to retard the spread of fire within the vehicle interior . the present invention provides an aircraft interior panel with skins comprising natural fibre reinforced composites based either on an inorganic thermoset resin or a thermoplastic resin . such panels provide the required flame and heat resistance , allow easy recycling and disposal , are cheaper and offer significant weight savings over conventional sandwich panels .

polyurethane foam compositions and processes to make flexible polyurethane foams are disclosed . polyurethane foam is produced in the presence of additives comprising guanidine derivatives . improvements in physical properties such as air flow , dimensional stability , tensile , tear , elongation and foam hardness is observed when these additives are present in polyurethane formulations . in addition , these additives can minimize polymer degradation under humid ageing conditions resulting in foam products with better mechanical properties .

the present invention relates generally to cutting blades for shredders . specifically , this invention teaches cutting blades , cutting blade assemblies , and a rotary cutting assembly which reduce the power needed to shred paper , plastic , and other forms of media that hold information . this is accomplished by creating a cutting blade with at least three adjacent teeth . the formation of three or more adjacent teeth more readily tears through paper and other media thus reducing the amount of power necessary to drive a shredder . this invention further discloses light weight cutting blades which require less material to manufacture , thus saving both materials and cost .

the formation of a cream and gel is described using a biopolymer , such as a polyhydroxyalkanoate , a polylactide , a polylactideglycolide and a polyglycoside , or a derivative thereof , in a latex form with the addition of a binder , which is generally an amphiphilic chemical entity . an hydrophobic domain of the amphiphilic chemical entity interacts with at least one biopolymer forming a water soluble complex , while the hydrophilic domain of the amphiphilic chemical entity maintains the soluble complex in suspension in an aqueous solution , which after proper heating becomes a gel or a cream . as a result , a versatile gel or cream is created with different compositions and textures that are obtained based on the nature of the binder used and the ratio of biopolymers and binder .

the present invention concerns methods for joining flexible polymer workpieces using light energy . these methods , referred to as laser welding , can be used to join thermoplastic or thermoset polymers . the laser welding method of the invention is applicable to the creation or repair of any article requiring the bonding of two flexible polymer components or a flexible polymer component and an inflexible polymer component .

a molded plastic closure for a beverage container , the closure having a shell with a top panel and a depending skirt , the shell being molded in one piece from a hard thermoplastic material . the closure is provided with an annular flange which extends from the underside of the top panel and which forms an annular space with the inside of the skirt . a liner is formed in situ within the closure by compression molding from a compression moldable soft , rubbery thermoplastic material , the underside of the top panel and the inside of the annular flange serving as molding surfaces . the annular flange is supported against lateral loads by a series of ribs which extend between the annular flange and the depending skirt . the liner is interlocked with the annular flange by interengaging ribs and recesses . both a top seal only closure for non - pressurized beverages and a top and side seal closure for pressurized beverages are disclosed .

a machine consisting of a vertically mobile liquid manifold filling system , and a horizontally mobile carriage for maneuvering pallets under a multi - head filler , for simultaneously filling entire pallet tiers of empty containers , such as 2 . 5 gallon metal or plastic jugs , bottles , or pails , 5 . 0 gallon metal or plastic jugs , bottles or pails , or 30 - 55 gallon metal or plastic drums , requires only the labor to lift and place empty containers onto a pallet , instead of the conventional physical handling and palletizing , of heavy , prefilled containers .

absorbable polyester fibers , braids , and surgical meshes with prolonged strength retention have been developed . these devices are preferably derived from biocompatible copolymers or homopolymers of 4 - hydroxybutyrate . these devices provide a wider range of in vivo strength retention properties than are currently available , and could offer additional benefits such as anti - adhesion properties , reduced risks of infection or other post - operative problems resulting from absorption and eventual elimination of the device , and competitive cost . the devices may also be particularly suitable for use in pediatric populations where their absorption should not hinder growth , and provide in all patient populations wound healing with long - term mechanical stability . the devices may additionally be combined with autologous , allogenic and / or xenogenic tissues to provide implants with improved mechanical , biological and handling properties .

the disclosure describes compositions , such as absorbent article topsheets or undersheets , that on its bodyside surfaces comprises an anionic surfactant - bound polymeric biguanide or an anionic surface - bound polymeric biguanide that can dissociate from the article so as to attack bacteria on the wearer &# 39 ; s skin .

an inkjet printing method having the steps of : i ) providing an ink jet printer that is responsive to digital data signals ; ii ) loading the printer with a porous ink jet recording element having a substrate having thereon a porous image - receiving layer having a ) inorganic particles encapsulated with an organic polymer having a tg of less than about 100 ° c . ; and b ) particles having a mean particle size of up to about 5 μm ; iii ) loading the printer with an inkjet ink composition ; and iv ) printing on the image - receiving layer using the ink jet ink composition in response to the digital data signals .

an improved mold frame for making a fast thermal response mold is disclosed . the mold frame has a plurality of rows with each row having a plurality of cavities . the mold frame is constructed of two half - molds , each half - mold containing an upper and lower plate vacuum brazed together to form flow channels that allow thermal mediums to pass in close proximity to the cavity . without any direct contact between the flow mediums and the cavities the necessity for o - rings is eliminated . without o - rings the compression molding of thermoplastic materials may be at temperatures greater than 300 ° f .

polymer slurries of ultrahigh molecular weight polyalpha - olefins are made stable toward settling , separation and agglomeration by surface treatment with a combination of wax and optional relatively high - density particulates . the selection of the surface coating acts not only as an anti - blocking agent , or partitioning aid to keep the tacky polymer particles separated , but also provides the suspended polymer particle with a density that matches the carrier . this prevents separation of the slurry components over time . such materials , ultimately used as pipeline additives to reduce the fluid drag and increase the volumetric throughput , can be stored and shipped for extended periods of time without degradation of the slurry quality . upon injection into the pipeline , the polymer particle dissolves quickly , unhindered by the coating .

biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride , itaconic anhydride or citraconic anhydride , or combinations thereof . free radical polymerization is used in the synthesis of the polymers , which are then hydrolyzed to replace ester groups with alcohol groups . the polymers may be complexed with ions and / or mixed with fertilizers or seed to yield agriculturally useful compositions . the preferred products of the invention may be applied foliarly , to seeds , to fertilizer , or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants .

a process for the production of a copolymer from at least one monomer which is gaseous under the polymerization conditions and at least one monomer that is liquid under the polymerization conditions by copolymerizing the same discontinuously in an aqueous media employing a polymerization vessel under conditions whereby a gas space is required , said gas space being provided by a second vessel connected to the polymerization vessel through a closeable connection , whereby on completion of polymerization , the closeable connection is closed in order to retain the gaseous monomer under pressure .

this invention relates to polymer production and in particular to a novel copolymer and a process for microbiologically producing the same . more specifically this invention provides for a poly - 3 - hydroxyalkanoate that includes medium length 3 - hydroxyacyl monomers and a process comprising culturing a microorganism with a medium chain fatty carbon source and a fatty acid oxidation inhibitor . this invention allows the use of microorganisms which normally incorporate only short chain fatty acids to produce phas containing short and medium chain 3 - hydroxyacyl monomers . the purpose of this invention is to produce a more versatile pha polymer which includes c6 , c7 and / or c8 3 - hydroxyacyl monomers .

a method of carrying out a solid phase chemical reaction or a filtration step to remove a solid from a liquid utilizing ferromagnetic particles . the particles may have a porous or otherwise bondable solid support material having adsorbed or chemically bonded thereon a biologically active substance to make them biologically active . alternatively , the particles may act as an inert medium to convey a solid precipitate out of a liquid . the process involves the addition of the ferromagnetic particles to a potentially reactive fluid . after the fluid has reacted either as a result of contact with the biologically active material or by a process causing a precipitate in the fluid , the particles may be separated from the fluid by bringing the particles into close proximity with a magnet such as an electromagnet . when sufficient particles are held in an elongated container and a magnetic force is exerted to hold the particles in a porous mass across the container , the particles may be moved through the liquid to filter solid particles from the liquid . a second container may be placed over a portion of the elongated container on the particles and any entrapped precipitate may be removed from the elongated container . the particles may alternatively have a bondable surface capable of adsorption or chemical coupling of biologically active materials . polymer and ceramic biomaterial supports and particular combinations with ferromagnetic materials are disclosed . a valve formed from the ferromagnetic particles is also disclosed herein .

a composition for the destruction of chemical warfare agents and toxic industrial chemicals having a polyoxometalate attached to an amine , carboxylic acid , or ammonium substituted porous polymer . also disclosed is a method for attaching a pom to an amine , carboxylic acid , or ammonium substituted porous polymer by dissolving the pom in water or an organic solvent , adding the functionalized porous polymer , whereby the pom ionically attaches to the amine , carboxylic acid or ammonium group , or heating the pom and functionalized polymer in the presence of a dehydrating agent whereby an imide bond is produced between the pom and the functionality on the porous polymer .

a child - resistant compact for dispensing product on blister cards includes a first portion having a first panel hinged to a first clamp for capturing an end of a first blister card , and a second portion having a second panel hinged to a second clamp for capturing an end of a second blister card . the first and second clamps are connected to each other such that the first and second panels form a chamber for enclosing the blister cards . at least one child - resistant latch is on the periphery of the panels for opening one or both panels with respect to the clamps for access to the blister cards . the first and second portions of the compact preferably are of integrally molded plastic construction , either separate from or integrally with each other . the at least one chid - resistant latch preferably includes a first latch at an end of the compact opposite from the clamps and second latches on opposite sides of the compact , preferably requiring simultaneous activation to open the compact . the panels preferably include a guide adjacent to the first latch for aligning the panels as the compact is closed to facilitate interengagement of the latch elements on the panels .

the present invention describes an improved grip belt drive system for use in sealing machines used to wrap articles in thermoplastic film . briefly , a timing belt is used in place of the traditional flat or v belt . the presence of teeth on the pulleys , coupled with the use of a timing belt eliminates the possibility of slippage between the belt and the pulleys . to protect the system in the case of a film jam or misplaced article , a torque - limiting mechanism is included , which disengages the drive system if there is excessive counterforce . furthermore , the outer surface of timing belt contains a pattern , which when mated with a second belt having the same or a complementary pattern , meshes in such a way so that the two belts are positively locked in both the longitudinal and transverse directions .

a method for preparing a laminate coronary stent comprising : providing a stent framework ; and depositing a plurality of layers on said stent framework to form said laminate coronary stent ; wherein at least one of said layers comprises a bioabsorbable polymer .

a recombinant gene encoding a single - chain variable fragment antibody against venezuelan equine encephalitis virus being cloned into a prokaryotic t7 rna polymerase - regulated expression vector was disclosed . a streptavidin - binding peptide sequence fused to a 6his tag is then attached downstream to the scfv gene . the recombinant fusion protein is expressed in bacteria and then purified by immobilized metal affinity chromatography . elisa and western blotting results revealed that the fusion protein not only retained vee antigen binding and specificity properties similar to those of its parent native monoclonal antibody , but also possessed streptavidin - binding activity . this discovery obviates the need for chemical biotinylation of antibodies and the risk associated with antibody denaturation and provides a stable and reproducible reagent for rapid and efficient immunoassay of vee .

appliances are made using a dental mold representing a patient &# 39 ; s dental configuration . in particular , thermoformable plastic positioning appliances which fit over the patient &# 39 ; s teeth may be formed over a three - dimensional mold of the patient &# 39 ; s dentition . an apparatus and methods which employ a manipulable or reconfigurable mold to model patient dentition and gingiva at each stage of treatment . the apparatus and methods are particularly useful for performing midcourse corrections during orthodontic procedures using a plurality of such appliances in sequence .

polymeric carpet and a method of making and recycling such carpet , the carpet having fibers , backing and extruded adhesive all of completely recyclable materials , the recycling being accomplished in one melting step , without a separation step .

the present invention provides an apparatus for efficient and clean handling of concrete admixtures that allows their incorporation into a concrete mixture in a pre - measured and controlled manner . the system provides a novel packaging system to be integrated into the admixture feed devices on a concrete batch mixing truck allowing transfer and incorporation of the admixture material to the concrete without additional handling by the operator . the present invention consists of a tubular package of heavy gauge cardboard or plastic material such as pvc with an easily removable light gauge cover on each end . the cover would be constructed of a material that could be easily displaced when installing the tube into the feeder section of the mixer . the tube is pre - loaded with any variety of clean pre - measured concrete admixtures .

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 at least one disease state relative to recognition of the presence and / or the absence of the biopolymer , predict disease risk assessment , and develop therapeutic avenues against the disease .

small , round , bio - compatible microspheres capable of covalently bonding proteins and having a uniform diameter below about 3500 a are prepared by substantially instantaneously initiating polymerization of an aqueous emulsion containing no more than 35 % total monomer including an acrylic monomer substituted with a covalently bondable group such as hydroxyl , amino or carboxyl and a minor amount of a cross - linking agent .

the present invention relates to a press platen or endless belt for embossing materials , in particular wooden materials or plastics materials . in order to considerably reduce the production costs and the use of material , it is proposed according to the invention that use is made of a sandwich body which consists of a carrier body and an embossing body , wherein said bodies are connected together in a firm and planar manner via a magnetically active and / or metallic adhesive agent . as a result of the selection of the adhesive agent , for example in the form of a magnetic film or magnetic materials , a hard or soft solder or a soldering paste , it is thus possible to break the connection in a reversible manner at any time and thus to exchange the embossing body .

the present invention discloses a process for producing a braided suture having an improved knot strength comprising heating a braided suture coated with a low molecular weight biocompatible polymer to a temperature sufficient to melt the low molecular weight biocompatible polymer for a time sufficient to allow the low molecular polymer to be redistributed into the interstices of the braided suture thereby providing a coated braided suture with an improved knot tensile strength . also disclosed is the coated braided suture having a low molecular weight polymer optimally dispersed throughout the braided suture &# 39 ; s cross - section .

a multi - leaflet heart valve composed of biocompatible polymer which , in all of its embodiments , simultaneously imitates the structure and dynamics of biological heart valves and avoids promotion of calcification . the valve includes a plurality of flexible leaflets dip cast on a mandrel , which leaflets are then bonded with a bonding agent to the interior surfaces of a plurality of struts on a metal - reinforced prosthetic stent . the leaflets open and close in response to the pumping action of the heart and , due to the design of the leaflets , fatigue resistance of the heart valve is high . the leaflets and the polymer components of the prosthetic stent are manufactured of biocompatible polymers exhibiting intrinsic calcification - resistant properties .

a method for manufacturing plastic containers in which , for each container , a plastic preform containing air is supplied ; the preform is heated at a preform temperature over the glass temperature of the preform material , the preform is inserted in a mold having a mold cavity ; and the preform is expanded to a container having the shape of a mold cavity by a forming liquid . the method also includes , between steps and , the injecting of a gaseous product into the preform containing air , wherein the gaseous product is absorbable by the forming liquid . the injection conditions of the gaseous product are selected such that the injected gaseous product expels the air out of the preform .

a process for coextrusion blowmolding of multilayer polymer articles , wherein a multilayer parison is extruded through a die , introduced into a mold , and blowmolded , the flow of multilayer plastic material being periodically interrupted , and additional plastic material being injected into the extrusion die at timed intervals , so that this additional material forms portion of the parison which later are trimmed from the molded article and reprocessed for reuse .

an inexpensive and rapid method for fabricating arrays of hollow microneedles uses a photoetchable glass . furthermore , the glass hollow microneedle array can be used to form a negative mold for replicating microneedles in biocompatible polymers or metals . these microneedle arrays can be used to extract fluids from plants or animals . glucose transport through these hollow microneedles arrays has been found to be orders of magnitude more rapid than natural diffusion .

a class of molecularly imprinted polymers that specifically recognizes and binds to tsnas are useful , for example , in analysis and separation of tsnas from biological fluids . such polymers are also useful in methods of treating and manufacturing tobacco products and materials .

a process is disclosed for converting polyacrylamide gel into dilute aqueous solutions suitable for use in secondary oil recovery . polyacrylamide gel is initially converted into a slurry of small gel particles in water from which forms a homogeneous solution concentrate which is then readily diluted to give the final drive fluid without any significant polymer degradation . the process may additionally be adapted to the drilling site or to other on site operations requiring polyacrylamide solutions such as water treating , mining or paper making .

an improved disposable receiver , formed by foldably nesting a shaped cover element into a correspondingly shaped tray element , for securely encasing sharp disposable surgical implements features a combination of reopenable retaining and locking means for retaining the receiver in the closed , nested position . in a preferred embodiment , the disposable receiver may be formed of transparent plastic material into symmetrical tray and cover portions separated by an integrally formed flexible hinge , and a number of integrally formed pressure fit snap locks are arrayed around the periphery of the receiver to provide readily reopenable closure retaining means . additionally , the tray and cover portions are slightly pyramidally shaped to produce a receiver of high rigidity when in the closed , nested position .

a preferred embodiment of the present invention provides a method and system for building cost - efficient biocompatible hydrogel constructs using stereolithography . hydrogel constructs may be used in , for example , multi - lumen nerve regeneration conduits and other tissue engineering scaffolds with embedded channel architecture that facilitate tissue regeneration through possible incorporation of precisely located bioactive agents , cells , and other desired inert and / or active chemical agents and devices . another preferred embodiment of the present invention provides a method of fabricating a hydrogel construct comprising : solidifying a first solution into a first construct layer with a first energy dosage using stereolithography , the first solution comprising : a first polymer ; and a first photoinitiator , wherein the first polymer and first photoinitiator are of a first concentration .

a reusable plastic drum container assembly having a fitting - receiving member in an opening provided in a drum head wherein the opening is formed by a cylindrically - shaped indentation portion extending perpendicularly from the top surface of the drum head and wherein the fitting - receiving member in cross - section is of an inverted u - shape having an inner cylindrically - shaped portion , a circularly - shaped base portion , and an outer cylindrically - shaped leg portion defining a channel and is disposed over the neck member of the drum head with an electromagnetic bonding material fused between the outer surfaces of the neck member and the interior surfaces of the fitting - receiving member .

a machine for the production of a web with individually wrapped drinking straws from two separate plastic films is disclosed . the machine includes a rotatable drum around which one of the plastic films is led and simultaneously given a corrugated form . the drinking straws are thereafter placed one by one in the recesses in the corrugated form and the second plastic film is applied and heat - sealed to said corrugated first film so that the drinking straws are completely enclosed in air - tight packages .

the invention relates to a personal watercraft carrier for transporting personal watercraft such as jet skis , wave runners and the like , into and out of the water . the personal watercraft carrier has a conventional carrier frame , which includes rail supports for the watercraft , and a tongue having a handle for pushing or pulling the carrier , and is supported by one or more axles , which rotatably mount large - surface wheels . the wheels support the weight of the watercraft and carrier while traveling over soft terrain e . g . sand . the wheels are constructed so that the carrier as a whole has neutral or negative - buoyancy . as a result of the neutral or negative - buoyancy of the carrier , the carrier can drop away as the depth of the water increases , thus enabling the watercraft to be easily removed from the carrier . similarly , the carrier can be positioned below the surface of the water for retrieval of the watercraft . the watercraft can then be easily floated into position over the carrier for retrieval . in one embodiment , the wheels are open so that water freely flows into the wheels . the large - surface wheels are typically constructed of a heavy - duty , dense plastic or metal and have a cylindrical rim and a disk or a number of spokes extending perpendicularly inward from the rim with gussets to the cylindrical surface . the carrier also includes rails that can be extended with a tongue - and - groove construction to accommodate longer watercraft , or multiple watercraft , on one carrier .

a biodegradable grass and debris catcher is attached to an exit chute of a lawn mower and garden vacuum / blower discharge chute to collect grass clippings and debris . the biodegradable grass and debris collector bag , containing grass clipping and debris , is composted or disposed of in a landfill without incorporating polymeric residue . the biodegradable grass and debris catcher has a plurality of layers , preferably three layers , of industrial strength paper . a plurality of air vent holes on side walls of the bag release discharged air while trapping grass clippings or debris . the industrial strength paper may be reinforced with biodegradable cotton fibers .

apparatus for filtering plasticized material between the inlet and the outlet of a housing has two parallel passages for reciprocable filter carriers each of which is movable between a first position and a second position . when in their first positions , the carriers permit plasticized material to flow from the inlet , through filters in their filter chambers and then into the outlet of the housing . if one of the carriers is moved to the second position while the other carrier remains in the first position , plasticized material which has been cleaned by passing through the filter of the other carrier is diverted in part into channels leading to the filter chamber of the one carrier , and such diverted material flows counter to the normal direction of flow of plasticized material through the chamber of the one carrier to entrain intercepted impurities and to expel the entrained impurities by way of a channel provided in the housing and being normally sealed from the chamber of the one carrier when the latter is maintained in the first position .

this invention discloses a process for making dilithium initiators in high purity . this process can be conducted in the absence of amines which is desirable since amines can act as modifiers for anionic polymerizations . the dilithium compounds made are highly desirable because they are soluble in aromatic solvents . the present invention also discloses a tire which is comprised of a generally toroidal - shaped carcass with an outer circumferential tread , two spaced beads , at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads , wherein said tread is adapted to be ground - contacting , and wherein said tread is a cured the rubber formulation which is comprised of at least one rubbery polymer containing functional groups of the structural formula : wherein r , r ′ and r ″ can be the same or different , wherein r is selected from the group consisting of hydrogen atoms , alkyl groups , aryl groups , alkaryl groups , and amino aryl groups , and wherein r ′ and r ″ represent alkyl groups alkyl groups that contain from 1 to 8 carbon atoms , and at least one member selected from the group consisting of carbon black and silica .

a coating and method for a coating an implantable device or prostheses are disclosed . the coating includes an undercoat of polymeric material containing an amount of biologically active material , particularly heparin , dispersed herein . the coating further includes a topcoat which covers less than the entire surface of the undercoat and wherein the topcoat comprises a polymeric material substantially free of pores and porosigens . the polymeric material of the topcoat can be a biostable , biocompatible material which provides long term non - thrombogenicity to the device portion during and after release of the biologically active material .

a biocompatible polymeric composition for cross - linking in - situ in a wound is disclosed comprising 1 ) one or more polyanionic polymers such as alginates or hyaluronates , able to be cross - linked the surface of the wound and 2 ) one or more polycationic polymers such as chitosan or deae - dextran , that assists in the solidification process as well as speeds up hemostasis without the need for applying pressure . the biocompatible polymeric composition may further comprise a cross - linking agent such as aqueous calcium chloride . the invention encompasses an initial polymeric composition , the solidified matrix cross - linked and integrated at the wound site , including the methods of using , applying , and cross - linking the composition .

a liquid transfer tool allows a nearly empty plastic bottle to be emptied into another bottle that is to be saved . shampoos and other liquid like perfume are very expensive and users of these products want to save every last drop in a bottle . the handy screw on caps include a mating portion that allows a user to screw both caps onto the bottles to be joined together for salvaging the fluid of the more empty bottle into the bottle that is more full through either a snap fit or male and female mating threads .

a method for manufacturing a blow - molded body employs a two - part blow - mold . a tubular preform is introduced , with the material in a thermoplastic state , into the opened blow - mold halves , and a reinforcing element is supported inside the preform by a displaceable holding device . during closing of the blow - mold halves , pressure is exerted on the wall regions of the preform that are adjacent to the reinforcing element . this pressure results in a reduced cross section of the preform wall in the region of the reinforcing element , and thermoplastic material is displaced . the interior of the preform is subjected to a blowing - pressure no later than when the pressure is applied from the exterior , and the blowing pressure causes the preform to inflate inside the mold . the displaced material anchors the reinforcing element inside the blow - molded body , and preferably forms bridges which extend across the blow - molded body and which cover the sides of the reinforcing element . the reinforcing element may also be provided with passages into which displaced material enters to form further bridges .

a process for converting municipal solid waste landfills to aerobic conditions that will allow for a highly accelerated and enhanced bioreduction of landfill mass , followed by the optional excavation of the landfill cell materials subsequent to the bioreduction process , separation of excavated materials using trommels , screens , and other means as necessary , production of useable compost materials , and reclamation of recyclable plastics , metal , and glass .

a breathing bag including a connector portion and a distensible portion manufactured by a process including the steps of providing moldable material , forming a portion of the moldable material into the connector portion of the breathing bag and forming another portion of the moldable material into the distensible portion of the breathing bag . the moldable material may be provided by extruding a parison of thermoplastic material ; the connector portion of the breathing bag may be formed by compression molding and the distensible portion of the breathing bag may be formed by blow molding or blow and vacuum molding ; such distensible and connector portions are formed or molded integrally . a one - piece breathing bag including integrally formed neck portion and distensible portion with the neck portion having a wall thickness sufficiently thick to permit the neck portion to be connected directly to a male fitting and with the distensible portion having a wall thickness sufficiently thin to permit the breathing bag to expand and contract in delivering breathing gas to a patient .

a method of powder coating the inside of tubular goods , such as oil field pipe and the like , by connecting one end of the pipe to a means for producing a flow of compressible gases therethrough . the other end of the pipe is open to atmospheric pressure . a valve means is connected upstream of the pipe between the inlet end thereof and a container for holding a single charge of plastic powder . the charge of powdered plastic is isolated upstream of the pipe inlet . the charge is of sufficient size to coat the entire inside peripheral wall surface of the pipe with a substantial uniform coating of plastic . the pipe is heated above the softening temperature of the plastic and rotated so that when the valve is opened air flows through the pipe and establishes a pressure gradient across the entire length of the pipe to cause the captured charge of plastic to form a pocket of dispersed plastic particles which is forced through the pipe by the air flow , causing plastic particles to be deposited and fused to the hot rotating inner surface of the pipe .

a random orbital finishing apparatus for finishing the surfaces of solid material including wood , plastic , metal and composites , but most particularly plastic solid surface materials . the apparatus includes a conveyor for transporting such unfinished material pass a uniquely mounted random orbital sander where it is subsequently finished thereby . the random orbitals may be dually mounted and in an offset position . the apparatus may further include a system of proximity sensors and air cylinders which enable the random orbitals to automatically adjust their position onto the surface to be finished when the material is passed thereby and subsequently return back to a starting position after the material passes .

a pallet cage , comprising a pallet and four walls mounted on its edges , together forming a cage open above and having the shape of a rectangular parellelopiped , in which the four walls of the cage are separate castings pressed from plastic and detached from each other , two of the walls are opposite and identical side walls while the other two are opposite and identical end walls , the end wall consists of a straight , elongated and plate - like part having a joining element at each end of it , the side wall consists of a straight , elongated and plate - like part having a 90 ° corner part at each end of it , the outer edges of the side walls being provided with counterparts of the joining elements , the walls being connectable to each other by the joining elements and their counterparts to form the walls of a cage having the form of a right - angled parallelogram .

a device for manipulation of flat articles such as sheets of paper , plastic , cardboard and the like has at least one adjustable conveying unit with conveying elements , especially rollers . the at least one conveying unit is adjustable between at least two positions for performing at least two manipulations on the article . at least one switch that is adjustable between at least two positions for performing at least two manipulations on the article is provided .

small , round , bio - compatible microspheres capable of covalently bonding proteins and having a uniform diameter below about 3500 a are prepared by substantially instantaneously initiating polymerization of an aqueous emulsion containing no more than 35 % total monomer including an acrylic monomer substituted with a covalently bondable group such a hydroxyl , amino or carboxyl and a minor amount of a cross - linking agent .

a wastewater treatment process elicits microorganisms to convert a waste stream / organic resource to intracellular biopolymer polyhydroxyalkanoate . the process includes waste stream / organic resource composition feed criteria , configuration coupled with operational parameters , and pha - laden biomass separation and stabilization . a waste stream / organic resource capable of producing enhanced levels of pha may be selected based on a combination of criteria , which may include short chain fatty acid concentration , protein concentration , polysaccharides concentration , and total suspended solids concentration . the waste stream is introduced into an aeration basin upon a specific configuration and operated under various parameter combinations for selecting / enriching microorganisms capable of producing pha . the pha - laden biomass is separated and stabilized for downstream pha related product beneficial uses . the present process achieves concurrent wastewater treatment and pha production , where pha level otherwise could not be obtained .

there is disclosed an improved spray tip for airless spraying of liquids in which the spray orifice is mounted in a rotatable turret member which is captured in a subassembly of a plastic spray guard and a tubular metal housing . the housing has a longitudinal through passageway which receives a floating piston seal member that has a forward , cylindrically concave face which is urged into a tight seal against the rotatable turret member by the liquid pressure which acts on the upstream face of the floating piston seal member . the floating piston seal member is sealed in the longitudinal through passageway by an annular seal which also restrains the turret member against rotation when the liquid pressure is released , thereby freely permitting substitution of spray orifices by interchanging of turret members . the turret member includes a handle with a dependent prong which is received through a slotted aperture of the spray guard into an internal cavity of the spray guard body having one side wall with shoulders which provide abutment stops for the turret member , thereby aligning its transverse bore with the longitudinal passageway through the housing .

a method for making tubular plastic material having shaped interlocking profiles thereon for use in reclosable bags by cross - cutting and sealing the material to form the individual bags . the tubular material is made in different diameters of tubes to form bags of different depths , and the speed of delivery of the plastic material and the rate of inflation and delfation is controlled to determine the diameter of the tubing , while the plastic delivery to the profile portion of the die is separately controlled and maintained at a rate , so that , for different sizes and gauges of tubing , the profile will be maintained constant thereby obtaining a profile of optimum size and providing for bags which can be varied in size , but which can each accommodate the same closing and opening slider which fits over the profiles . this method of extruding profile tubes requires fewer changes in extrusion dies .

a method of making a sustained release microsphere formulation , wherein the release rate of a bioactive ingredient is manipulated by controlling the crystallinity of said bioactive ingredient , includes the steps of combining the active ingredient and an encapsulating polymer in at least one solvent , or mixtures thereof , to form a dispersed phase and processing the dispersed phase without filtering , filtering the combined dispersed phase with a hydrophobic or a hydrophilic filter , or filtering the active ingredient and encapsulating polymer individually with a hydrophobic or hydrophilic filter before combining them to form the dispersed phase . the dispersed phase is then combined with a continuous phase to form the microsphere formulation .

this invention relates to a process for preparation of biodegradable biocompostable biodigestible peplene polymer comprising steps of : mixing at least one peptide with at least one protein and enzyme , adding a composting agent , blending with at least one polymer in presence of additive to obtain said peplene polymer material .

a reusable produce and bulk - item shopping system and related business method designed to eliminate the need for using plastic film bags in retail sales of produce and other grocery items sold by weight . disclosed are a caddy and a plurality of relatively smaller , reusable bags that fit neatly into the caddy . the caddy and bags are preferably sized and shaped to allow close engagement between the caddy and the smaller bags when the caddy and the bags are in the open position and filled . the smaller bags are of uniform weight , and the associated business method teaches several unique methods to easily and properly account for the weight of the bag at the check stand , in order to easily effect a net weight sale of the items in the bag .

an iontophoretic structure for medical devices is provided that uses controlled electrical current derived from two dissimilar galvanic materials to drive oligodynamic metal ions into solution to kill bacteria on and near the device to which the structure is affixed . in one embodiment , a first galvanic material separated from a second galvanic material by a resistive material produces an anti - bacterial current flow when placed in contact with an electrolytic fluid . in another embodiment , a cylindrical elastomeric catheter incorporates a first and a second galvanic material separated by a resistive material which controls a current flow between the galvanic materials when the catheter is immersed in an electrolytic fluid . the galvanic materials can be dissimilar metal powders embedded in a conductive polymer substrate that forms an iontophoretic composite material , or dissimilar metals arranged in layers separated by a resistive layer . in yet another embodiment , the iontophoretic composite material is configured as an infection control sleeve that covers a portion of an ordinary catheter or cannula . methods of protecting implantable medical devices and body structures with the iontophoretic structures are also provided .

a bed of transparent , water insoluble , charge - free crosslinked gel which is suitable for use in electrophoresis is prepared . the gel is formed by dissolving a linear polysaccharide , such as agarose , in a suitable solvent , such as water . this dissolution may be accomplished with agitation . a suitable cross linking agent , which is not itself charged , nor does it become charged upon contact with water , at a ph of 2 to 12 , is then added to the solution , possibly with agitation in order to get thorough mixing of the linear polysaccharide and the cross linking agent . this mixture is then allowed to incubate and react in a quiescent state to substantially simultaneously gel and crosslink to form the desired cross linked gel bed . preferred cross - linking agents are bis - epoxides , halo - epoxides , bis - haloalkanes , bis - halo - alcohols , alkanediol - bis - alkyl sulfonates , alkanediol - bis - aryl sulfonates or divinylsulfone . the liner polysaccharide maybe mixed with a synthetic polymer such as polyvinyl alcohol .

a polymer of fluorinated monomers and hydrophilic monomers is provided . it is also provided a polymer blend that contains a polymer of fluorinated monomers and another biocompatible polymer . the polymer of fluorinated monomers or polymer blend described herein and optionally a bioactive agent can form a coating on an implantable device such as a drug - delivery stent . the implantable device can be used for treating or preventing a disorder such as atherosclerosis , thrombosis , restenosis , hemorrhage , vascular dissection or perforation , vascular aneurysm , vulnerable plaque , chronic total occlusion , patent foramen ovale , claudication , anastomotic proliferation for vein and artificial grafts , bile duct obstruction , ureter obstruction , tumor obstruction , or combinations thereof .

a method and apparatus for generating lubricant at the head / disk interface throughtout the life of a disk drive utilizing friction at the slider / disk interface to activate the polymerization of a monomer at the catalytic surface on the slider and / or the disk surface . the monomer is supplied to the catalytic surface through the vapor state from a reservoir .