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Expired European patentEurope

Circuit for converting three-state signals into binary signals

EP 0246689 B1 · Applicant: Philips Electronics N.V.

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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 May 11, 1987 and granted August 5, 1992. A European patent lasts at most 20 years from filing, so its term ended May 11, 2007.
  • 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 November 11, 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.
FiledMay 11, 1987
PublishedNovember 25, 1987
GrantedAugust 5, 1992
Term endedMay 11, 2007
Application numberEP 87200843
Classification (CPC)H03M5/16

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedMay 11, 1987PublishedNov 25, 1987Patent grantedAug 5, 1992Term endedMay 11, 2007

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.