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Expired European patentEurope

A negative electrode for a storage battery with a nonaqueous electrolyte and a process for producing the same

EP 0561372 B1 · Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

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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 March 17, 1993 and granted June 4, 1997. A European patent lasts at most 20 years from filing, so its term ended March 17, 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 September 17, 2018.
  • 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.
FiledMarch 17, 1993
PublishedSeptember 22, 1993
GrantedJune 4, 1997
Term endedMarch 17, 2013
Application numberEP 93104339
Classification (CPC)H01M4/587

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedMarch 17, 1993PublishedSep 22, 1993Patent grantedJune 4, 1997Term endedMarch 17, 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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