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Expired European patentEurope

Precharge circuit for a digital data transfer bus

EP 0156675 B1 · Applicant: THOMSON SEMICONDUCTEURS

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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 February 19, 1985 and granted December 23, 1987. A European patent lasts at most 20 years from filing, so its term ended February 19, 2005.
  • 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 August 19, 2010.
  • 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.
FiledFebruary 19, 1985
PublishedOctober 2, 1985
GrantedDecember 23, 1987
Term endedFebruary 19, 2005
Application numberEP 85400296
Classification (CPC)G06F13/4077

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedFeb 19, 1985PublishedOct 2, 1985Patent grantedDec 23, 1987Term endedFeb 19, 2005

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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