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Expired European patentEurope

Ceramic resonator, and ceramic filter using the ceramic resonator

EP 0083237 B1 · Applicant: FUJITSU LIMITED

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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 24, 1982 and granted May 25, 1988. A European patent lasts at most 20 years from filing, so its term ended December 24, 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 June 24, 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.
FiledDecember 24, 1982
PublishedJuly 6, 1983
GrantedMay 25, 1988
Term endedDecember 24, 2002
Application numberEP 82306961
Classification (CPC)H03H9/177 +2 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedDec 24, 1982PublishedJuly 6, 1983Patent grantedMay 25, 1988Term endedDec 24, 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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