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Expired European patentEurope

Isomerisation of 3-azabicyclo(3.1.0)hexane derivatives

EP 0010787 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

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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 September 17, 1979 and granted May 12, 1982. A European patent lasts at most 20 years from filing, so its term ended September 17, 1999.
  • 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 March 17, 2005.
  • 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.
FiledSeptember 17, 1979
PublishedMay 14, 1980
GrantedMay 12, 1982
Term endedSeptember 17, 1999
Application numberEP 79200518
Classification (CPC)C07D209/52 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedSep 17, 1979PublishedMay 14, 1980Patent grantedMay 12, 1982Term endedSep 17, 1999

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

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