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Expired European patentEurope

Wideband passive ringmixer and receiver comprising such a mixer

EP 0012657 B1 · Applicant: THOMSON-CSF

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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 November 30, 1979 and granted March 16, 1983. A European patent lasts at most 20 years from filing, so its term ended November 30, 1999.
  • 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 May 30, 2005.
  • 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.
FiledNovember 30, 1979
PublishedJune 25, 1980
GrantedMarch 16, 1983
Term endedNovember 30, 1999
Application numberEP 79400940
Classification (CPC)H03D7/1408 +2 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedNov 30, 1979PublishedJune 25, 1980Patent grantedMarch 16, 1983Term endedNov 30, 1999

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.