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Expired European patentEurope

Separator of battery wherein organic electrolyte is used and production thereof

EP 0547237 B1 · Applicant: Asahi Kasei Kogyo Kabushiki Kaisha

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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 2, 1992 and granted June 12, 1996. A European patent lasts at most 20 years from filing, so its term ended July 2, 2012.
  • 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 January 2, 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.
FiledJuly 2, 1992
PublishedJune 23, 1993
GrantedJune 12, 1996
Term endedJuly 2, 2012
Application numberEP 92914097
Classification (CPC)H01M50/44 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedJuly 2, 1992PublishedJune 23, 1993Patent grantedJune 12, 1996Term endedJuly 2, 2012

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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