Computer-based patent searches: Using the IPC or free text?
Documentary indications of the British patent specification 14 79 444 are traced through various machine-readable stores (OTAF, DERWENT, CASEARCH, CLAIMS/US) and various printed collections (claims of German Offenlegungsschriften, US and GB abstracts and Chemical Abstracts). The traceability of patents such as GB 14 79 444 (electrolytic cell with diaphragm and titanium anodes with a catalytically active coating of platinum or ruthenium and their compounds) using the IPC and free text terms is compared. Symptomatically, it was found that free text searches go further than IPC searches, because they can reach a greater search depth.
Objective To study the best extracting technology of Compound Taizishen Granule prescription.Methods The total polysaccharides and total saponins were determined by UV spectrophotometer.With the content of total polysaccharides and total saponins as comprehensive indexes,orthogonal test was applied to investigation of the water addition,extraction time,and extraction times for optimizing the best extracting technology.Results The best extracting technology was using 10 times the amount of water,extracting 3 times and 1.5 h per time.Conclusion The extraction technology is safe and effective,which can be used as extraction for Compound Taizishen Granule prescription.