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Expired European patentEurope

A fir-type balance filter incorporated in the transmitter-receiver unit in a telecommunication system

EP 0092569 B1 · Applicant: TELEFONAKTIEBOLAGET L M ERICSSON

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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 2, 1982 and granted October 24, 1984. A European patent lasts at most 20 years from filing, so its term ended November 2, 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 May 2, 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.
FiledNovember 2, 1982
PublishedNovember 2, 1983
GrantedOctober 24, 1984
Term endedNovember 2, 2002
Application numberEP 82903351
Classification (CPC)H03H17/06 +1 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedNov 2, 1982PublishedNov 2, 1983Patent grantedOct 24, 1984Term endedNov 2, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.