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Expired European patentEurope

Process for the hydrogenation of unsaturated organic compounds using solid catalysts

EP 0273575 B1 · Applicant: The British Petroleum Company p.l.c.

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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 20, 1987 and granted April 15, 1992. A European patent lasts at most 20 years from filing, so its term ended November 20, 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 20, 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 20, 1987
PublishedJuly 6, 1988
GrantedApril 15, 1992
Term endedNovember 20, 2007
Application numberEP 87310299
Classification (CPC)B01J23/83 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedNov 20, 1987PublishedJuly 6, 1988Patent grantedApril 15, 1992Term endedNov 20, 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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