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EP 0070729 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 July 19, 1982 and granted March 20, 1985. A European patent lasts at most 20 years from filing, so its term ended July 19, 2002.
  • 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 19, 2008.
  • 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 19, 1982
PublishedJanuary 26, 1983
GrantedMarch 20, 1985
Term endedJuly 19, 2002
Application numberEP 82303788
Classification (CPC)C09K5/063

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedJuly 19, 1982PublishedJan 26, 1983Patent grantedMarch 20, 1985Term endedJuly 19, 2002

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.