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Expired European patentEurope

Optimized positive electrode for alkaline cells

EP 0667982 B1 · Applicant: OVONIC BATTERY COMPANY, INC.

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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 10, 1993 and granted April 28, 1999. A European patent lasts at most 20 years from filing, so its term ended November 10, 2013.
  • 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 10, 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.
FiledNovember 10, 1993
PublishedAugust 23, 1995
GrantedApril 28, 1999
Term endedNovember 10, 2013
Application numberEP 94901416
Classification (CPC)H01M10/345 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedNov 10, 1993PublishedAug 23, 1995Patent grantedApril 28, 1999Term endedNov 10, 2013

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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