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Expired European patentEurope

Method for the catalytic hydrogenation of DAHNP and for preparing DAFHP

EP 0267594 B1 · Applicant: BOEHRINGER INGELHEIM KG

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed November 11, 1987 and granted February 10, 1993. A European patent lasts at most 20 years from filing, so its term ended November 11, 2007.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by May 11, 2013.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledNovember 11, 1987
PublishedMay 18, 1988
GrantedFebruary 10, 1993
Term endedNovember 11, 2007
Application numberEP 87116630
Classification (CPC)C07D239/50

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedNov 11, 1987PublishedMay 18, 1988Patent grantedFeb 10, 1993Term endedNov 11, 2007

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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