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Expired European patentEurope

Gate array integrated circuit using schottky-barrier FETs

EP 0151870 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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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 22, 1984 and granted January 31, 1990. A European patent lasts at most 20 years from filing, so its term ended November 22, 2004.
  • 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 22, 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.
FiledNovember 22, 1984
PublishedAugust 21, 1985
GrantedJanuary 31, 1990
Term endedNovember 22, 2004
Application numberEP 84308097
Classification (CPC)G11C5/02 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedNov 22, 1984PublishedAug 21, 1985Patent grantedJan 31, 1990Term endedNov 22, 2004

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.