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Expired European patentEurope

A read only memory circuit

EP 0182717 B1 · Applicant: FUJITSU LIMITED

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 20, 1985 and granted January 30, 1991. A European patent lasts at most 20 years from filing, so its term ended November 20, 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 May 20, 2011.
  • 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 20, 1985
PublishedMay 28, 1986
GrantedJanuary 30, 1991
Term endedNovember 20, 2005
Application numberEP 85402244
Classification (CPC)G11C16/0441

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedNov 20, 1985PublishedMay 28, 1986Patent grantedJan 30, 1991Term endedNov 20, 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

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