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Expired European patentEurope

Built-in self-test circuit for memory

EP 1031995 B1 · Applicant: Worldwide Semiconductor Manufacturing Corporation

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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 23, 1999 and granted May 22, 2002. A European patent lasts at most 20 years from filing, so its term ended February 23, 2019.
  • 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 23, 2024.
  • 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 23, 1999
PublishedAugust 30, 2000
GrantedMay 22, 2002
Term endedFebruary 23, 2019
Application numberEP 99103479
Classification (CPC)G01R31/31813 +1 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedFeb 23, 1999PublishedAug 30, 2000Patent grantedMay 22, 2002Term endedFeb 23, 2019

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.