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Expired European patentEurope

Process for preparing thiophene derivatives

EP 0299586 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 July 12, 1988 and granted April 13, 1994. A European patent lasts at most 20 years from filing, so its term ended July 12, 2008.
  • 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 January 12, 2014.
  • 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.
FiledJuly 12, 1988
PublishedJanuary 18, 1989
GrantedApril 13, 1994
Term endedJuly 12, 2008
Application numberEP 88201494
Classification (CPC)C07D333/28

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJuly 12, 1988PublishedJan 18, 1989Patent grantedApril 13, 1994Term endedJuly 12, 2008

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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