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Expired European patentEurope

Digital circuit with transistor geometry and channel stops providing camouflage against reverse engineering

EP 0764985 B1 · Applicant: Hughes Aircraft Company

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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 10, 1996 and granted September 30, 2009. A European patent lasts at most 20 years from filing, so its term ended May 10, 2016.
  • 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 10, 2021.
  • 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 10, 1996
PublishedMarch 26, 1997
GrantedSeptember 30, 2009
Term endedMay 10, 2016
Application numberEP 96107428
Classification (CPC)G11C7/24 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedMay 10, 1996PublishedMarch 26, 1997Patent grantedSep 30, 2009Term endedMay 10, 2016

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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