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Expired European patentEurope

Static random access type semiconductor memory device

EP 0506089 B1 · Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA

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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 March 27, 1992 and granted November 19, 1997. A European patent lasts at most 20 years from filing, so its term ended March 27, 2012.
  • 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 September 27, 2017.
  • 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.
FiledMarch 27, 1992
PublishedSeptember 30, 1992
GrantedNovember 19, 1997
Term endedMarch 27, 2012
Application numberEP 92105315
Classification (CPC)H10B10/125

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedMarch 27, 1992PublishedSep 30, 1992Patent grantedNov 19, 1997Term endedMarch 27, 2012

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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