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January 2020

Changes to Derwent WPI Update numbering and the total number of annual DWPI updates

December 2019

Derwent World Patents Index: Manual Code revision 2020

December 2019

New Korean Patent Full-Text Database KRFULL released

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MARPAT Backfile Expansion Update

19. October 2012

In March 2012, CAS announced that the MARPAT database would be enhanced with English-, German- and Japanese-language patents from 1987. The addition of English- and German-language patents for 1987 is now complete. Processing of English- and German-language patents from 1985 and 1986 and Japanese-language patents from 1987 is continuing. We are pleased to report that Markush information from over 2,600 patent publications has been added to date.