Derwent Chemistry Resource
Derwent Chemistry Resource (DCR) offers structure searching and various other substance identification and indexing data of the chemical structures indexed from update 199916 forward within Derwent World Patents Index® (DWPISM) and the Derwent Drug File (DDF).
For patents included in DWPI, DCR includes:
- All claimed compounds.
- At least the main (best) example. If there are few claimed compounds, more examples are selected.
- For compounds outside the claims, priority of selection is given to real compounds (i.e., those with good supporting physical and/or biological data).
- Where compounds are selected from a range of examples, those that best illustrate the structural diversity of patent coverage are selected.
Derwent Chemistry Resource includes biological, organic, organometallic and inorganic compounds.
Derwent Chemistry Resource cites chemical structures from the more than one million patents classified in Derwent Sections B, C and E (Pharmaceuticals, Agrochemicals and General Chemistry).
Lexis-Nexis Univentio (LNU) provides access to the complete text of patents issued by 33 countries and patenting authorities around the world, and the bibliographic data of 72 additional patenting authorities. The patents are organized in separate databases by country/authority, such as Denmark Patents Fulltext and WIPO PCT Patents Fulltext.
Celebrating its 55th anniversary in 2018, Derwent World Patents Index (DWPISM), produced by Clarivate Analytics, provides access to information for over 37.4 million inventions covering more than 100 million patent documents worldwide. Each update adds an average of 46,000 documents from more than 50 worldwide sources including patent issuing authorities and and defensive publications.
Derwent Patents Citation Index (DPCI), produced by Clarivate Analytics, provides access to more than 98 million patent and 11 million literature citations found in more than 11 million patent families. In each update, examiner citations from about 50,000 documents from major patent-issuing authorities are added. Each record in the database describes a patent family for a single invention.