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Expired European patentEurope

Semiconductor switching device with anode shorting structure

EP 0270975 B1 · Applicant: KABUSHIKI KAISHA TOSHIBA

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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 November 30, 1987 and granted November 9, 1994. A European patent lasts at most 20 years from filing, so its term ended November 30, 2007.
  • 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 May 30, 2013.
  • 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.
FiledNovember 30, 1987
PublishedJune 15, 1988
GrantedNovember 9, 1994
Term endedNovember 30, 2007
Application numberEP 87117692
Classification (CPC)H10D62/142 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedNov 30, 1987PublishedJune 15, 1988Patent grantedNov 9, 1994Term endedNov 30, 2007

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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