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Expired European patentEurope

Varactor-tuned frequency doubler oscillator

EP 0321329 B1 · Applicant: THOMSON HYBRIDES ET MICROONDES

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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 December 12, 1988 and granted November 13, 1991. A European patent lasts at most 20 years from filing, so its term ended December 12, 2008.
  • 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 June 12, 2014.
  • 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.
FiledDecember 12, 1988
PublishedJune 21, 1989
GrantedNovember 13, 1991
Term endedDecember 12, 2008
Application numberEP 88403151
Classification (CPC)H03B5/1852

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedDec 12, 1988PublishedJune 21, 1989Patent grantedNov 13, 1991Term endedDec 12, 2008

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.