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Expired European patentEurope

High-temperature fuel cell with improved solid electrolyte/electrode contact surface, and method of producing the contact surface

EP 0696386 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 April 18, 1994 and granted June 25, 1997. A European patent lasts at most 20 years from filing, so its term ended April 18, 2014.
  • 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 October 18, 2019.
  • 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.
FiledApril 18, 1994
PublishedFebruary 14, 1996
GrantedJune 25, 1997
Term endedApril 18, 2014
Application numberEP 94912465
Classification (CPC)H01M8/1213

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedApril 18, 1994PublishedFeb 14, 1996Patent grantedJune 25, 1997Term endedApril 18, 2014

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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