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Expired European patentEurope

Circuit utilizing Josephson effect

EP 0074666 B1 · Applicant: NEC CORPORATION

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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 September 14, 1982 and granted January 8, 1986. A European patent lasts at most 20 years from filing, so its term ended September 14, 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 March 14, 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.
FiledSeptember 14, 1982
PublishedMarch 23, 1983
GrantedJanuary 8, 1986
Term endedSeptember 14, 2002
Application numberEP 82108467
Classification (CPC)H03K19/1956

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedSep 14, 1982PublishedMarch 23, 1983Patent grantedJan 8, 1986Term endedSep 14, 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

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