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Expired European patentEurope

Anode material for electrolytic manganese dioxide cell

EP 0333746 B1 · Applicant: KERR-MCGEE CHEMICAL 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 November 12, 1987 and granted May 13, 1992. A European patent lasts at most 20 years from filing, so its term ended November 12, 2007.
  • 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 12, 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.
FiledNovember 12, 1987
PublishedSeptember 27, 1989
GrantedMay 13, 1992
Term endedNovember 12, 2007
Application numberEP 87907903
Classification (CPC)C22C14/00 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedNov 12, 1987PublishedSep 27, 1989Patent grantedMay 13, 1992Term endedNov 12, 2007

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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