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Expired European patentEurope

MISFET with lightly doped drain and method of manufacturing the same

EP 0187016 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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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 December 18, 1985 and granted February 20, 1991. A European patent lasts at most 20 years from filing, so its term ended December 18, 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 June 18, 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.
FiledDecember 18, 1985
PublishedJuly 9, 1986
GrantedFebruary 20, 1991
Term endedDecember 18, 2005
Application numberEP 85309209
Classification (CPC)H10D30/60 +2 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedDec 18, 1985PublishedJuly 9, 1986Patent grantedFeb 20, 1991Term endedDec 18, 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

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