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Expired European patentEurope

Block copolymer compositions and process for the preparation thereof

EP 0333936 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 25, 1988 and granted December 15, 1993. A European patent lasts at most 20 years from filing, so its term ended March 25, 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 September 25, 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.
FiledMarch 25, 1988
PublishedSeptember 27, 1989
GrantedDecember 15, 1993
Term endedMarch 25, 2008
Application numberEP 88200570
Classification (CPC)C08L53/02 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMarch 25, 1988PublishedSep 27, 1989Patent grantedDec 15, 1993Term endedMarch 25, 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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