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Expired European patentEurope

Porous polypropylene membrane and process for its production

EP 0341309 B1 · Applicant: TERUMO KABUSHIKI KAISHA

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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 January 20, 1988 and granted December 27, 1996. A European patent lasts at most 20 years from filing, so its term ended January 20, 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 July 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.
FiledJanuary 20, 1988
PublishedNovember 15, 1989
GrantedDecember 27, 1996
Term endedJanuary 20, 2008
Application numberEP 88901092
Classification (CPC)B01D69/08 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJan 20, 1988PublishedNov 15, 1989Patent grantedDec 27, 1996Term endedJan 20, 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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