Patent World patents index

Most databases, e.g. the World Patents Index, provide a "Learn database" function (LWPl) to give the opportunity for training in the specific retrieval strategies for patents. 

The World Patent Index of Derwent Information Ltd. is a broad collection of international value-added patent documents from 40 patent-issuing authorities. The bibliographic database contains 11.6 million patent records with 5.5 million images (October, 2002) and grows by 1.5 million patent documents each year. The classified and indexed documents (since 1963) are sometimes provided wdth additional abstracts or significant titles. 

World Patent Index (WPI) Derwent Pubfications, Ltd. Dialog, Orbit, Questel, STN chemical, electrical, mechanical patents... 

World Patents Index DIALOG, ORBIT, Questel, STN Derwent Information Ltd. international limited bibliographic data patent families comprehensive English language abstracts of basic and some equivalent granted patents polymer and chemical stmcture indexing for subscribers drawings... 

World Patents Index / APIPAT ORBIT Derwent Information Ltd. American Petroleum Institute international limited bibhographic data patent families comprehensive English language abstracts of basic patents aU Wodd Patents Index and APIPAT indexing for subscribers... 

Derwent World Patents Index. Derwent World Patents Index (DWPI) [76] is a comprehensive database of patent documents published worldwide. It covers over 10 million separate inventions from more than 20 million basic and equivalent patent documents. DWPI is commercially available on the following online services DIALOG, Questel, Orbit, and STN. Pharmaceuticals from 1963, agricultural and veterinary medicine from 1965, plastics and polymers from 1966, all chemistry from 1970, electronics, electrical and mechanical engineering from 1974, and comprehensive coverage of all... 

Derwent World Patents Index, [Internet]. URL http // www.derwent.com/, accessed 7-20-2000. 

CHEMDOC code, 18 242. See also FARMDOC service Derwent World Patents Index (WPI),... 

Science. Technology. EPAT. European Directory of Agrochemical Products. GenBand. INPADOC. INSPECT JAPIO. Rapra Abstracts. Scl.Search. TTiomas Register Online. LTS. Patents Fulllcxi. World Patent Index (WPI), World Surface Coalings, and World Textiles. 

Chemical Substructure Databases. Several patent databases are searchable by chemical substructure. These are designed to give higher relevance of retrieval when searching chemical compounds than the bibliographic or lull-text databases. They include MPHARM. WPIM (World Patents Index Markuslil. and MARPAT. 

World Patents Index. WPI, produced by Derwent Publications, Ltd., contains records of patent publications from 32 issuing authorities around the world. Since 1970, all chemical technologies are included. Prior to then, content varies as follows polymers from 1966, agricultural chemicals from 1965, and pharmaceuticals from 1963. Records contain bibliographic data and an abstract, which describes the novel features of the patent. The patent tides and abstracts in WPI are created by Derwent and generally give a more definitive description of the patent s content than the title and abstract, which appear on the document itself Records also list equivalent or family member patents that have been identified as covering the same or related invention(s) (92). 

WPIM (World Patents Index Markush), produced by Derwent Publications, Ltd., contains the specific and generic structure records for compounds in the patents included in Derwent Sections B (Farmdoc), C (Agdoc), and E (Chemdoc) since 1987. Sources include patents from 29 industrialized countries as well as European and PCT patents and also items from Research Disclosure and International Technology Disclosures. The compound numbers of relevant references found in WPIM can be searched in Derwent s WPI database to retrieve the corresponding bibliographic information. 

Because the electrochemistry of pyridines has not been reviewed before with regard to industrially significant processes, this review will therefore cover the period 1801-1983. Citations from 1801-1975 have been compiled in Swann s bibliography.1 These citation listings were broken down into six indices author, patent, product molecular formula, synonym, product name, and product type. A computer-aided search of Chemical Abstracts and the World Patent Index covered the period 1967-1983. Other sources such as the reviews on heterocyclic electrochemistry by Lund2 and Nelson3 contained useful citations. Nelson s review has a valuable table that summarizes the synthetic work by indexing the parent heterocycle. 

The pipeline of innovation, expressed in filed patents, has also changed. The Derwent World Patent Index shows that the number of patents in the world nearly tripled to 710,000/year between 1980 and 2004, whereas in the chemical industry it only doubled to 213,000/year. Since 1992, the number of patents in the chemical industry has been steady. 

Derwent World Patents Index, Thomson Scientific, The Thomson Corporation http // scientific.thomson.com/products/dwpi/ (accessed December 23, 2007). 

Derwent World Patents Index—references to patents, including chemical structure and use patents... 

Organosilicon Patents issued 1953 - 2003. Source Dow Coming Corporation internal collection (1953 - 1973), Derwent World Patent Index search for Si patent families (1974 - present). 

World Patent Index. London Derwant Publication. 

Derwent Guide to Patent Expiries. 9th ed. London Thomson Derwent, 2004. A collection of short siunmaries of the patent terms and legislation of coimtries covered by the Derwent World Patents Index (DWPI) and INPADOC, republished frequently as a bound volume and updated on the Derwent Web site (http //www.derwent.com). 

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