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Expired European patentEurope

Memory test method and nonvolatile memory with low error masking probability

EP 1089293 B1 · Applicant: STMicroelectronics S.r.l.

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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 September 30, 1999 and granted December 10, 2008. A European patent lasts at most 20 years from filing, so its term ended September 30, 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 March 30, 2025.
  • 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.
FiledSeptember 30, 1999
PublishedApril 4, 2001
GrantedDecember 10, 2008
Term endedSeptember 30, 2019
Application numberEP 99830617
Classification (CPC)G11C29/40

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedSep 30, 1999PublishedApril 4, 2001Patent grantedDec 10, 2008Term endedSep 30, 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

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