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Expired European patentEurope

Polymers of carbon monoxide with cyclopentenes

EP 0390237 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 March 1, 1990 and granted October 18, 1995. A European patent lasts at most 20 years from filing, so its term ended March 1, 2010.
  • 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 September 1, 2015.
  • 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.
FiledMarch 1, 1990
PublishedOctober 3, 1990
GrantedOctober 18, 1995
Term endedMarch 1, 2010
Application numberEP 90200490
Classification (CPC)C08G67/02

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedMarch 1, 1990PublishedOct 3, 1990Patent grantedOct 18, 1995Term endedMarch 1, 2010

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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