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Expired European patentEurope

Proton exchange membrane fuel cell with variable porosity gas distribution layers

EP 1184924 B1 · Applicant: General Motors Corporation

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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 July 18, 2001 and granted December 10, 2008. A European patent lasts at most 20 years from filing, so its term ended July 18, 2021.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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 18, 2001
PublishedMarch 6, 2002
GrantedDecember 10, 2008
Term endedJuly 18, 2021
Application numberEP 01117392
Classification (CPC)H01M8/241 +2 more

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedJuly 18, 2001PublishedMarch 6, 2002Patent grantedDec 10, 2008Term endedJuly 18, 2021

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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