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Expired European patentEurope

Circuit for detecting synchronism in a digital broadcast receiver

EP 0255840 B1 · Applicant: SONY 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 December 25, 1986 and granted March 23, 1994. A European patent lasts at most 20 years from filing, so its term ended December 25, 2006.
  • 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 25, 2012.
  • 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 25, 1986
PublishedFebruary 17, 1988
GrantedMarch 23, 1994
Term endedDecember 25, 2006
Application numberEP 87900281
Classification (CPC)H04L7/042

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedDec 25, 1986PublishedFeb 17, 1988Patent grantedMarch 23, 1994Term endedDec 25, 2006

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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