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Expired European patentEurope

New polymer material for electrolytic membranes in fuel cells

EP 0870340 B1 · Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

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Overview

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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 November 22, 1996 and granted April 21, 2004. A European patent lasts at most 20 years from filing, so its term ended November 22, 2016.
  • 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 May 22, 2022.
  • 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.
FiledNovember 22, 1996
PublishedOctober 14, 1998
GrantedApril 21, 2004
Term endedNovember 22, 2016
Application numberEP 96944201
Classification (CPC)H01M8/1009 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedNov 22, 1996PublishedOct 14, 1998Patent grantedApril 21, 2004Term endedNov 22, 2016

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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