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Expired European patentEurope

A sensor circuit including a sensing device

EP 0022366 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 4, 1980 and granted October 24, 1984. A European patent lasts at most 20 years from filing, so its term ended July 4, 2000.
  • 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 4, 2006.
  • 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 4, 1980
PublishedJanuary 14, 1981
GrantedOctober 24, 1984
Term endedJuly 4, 2000
Application numberEP 80302283
Classification (CPC)G01N27/121

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedJuly 4, 1980PublishedJan 14, 1981Patent grantedOct 24, 1984Term endedJuly 4, 2000

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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