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Expired European patentEurope

Thin-film transistor with a protective layer and method of manufacturing the same

EP 0542279 B1 · Applicant: CASIO COMPUTER COMPANY LIMITED

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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 12, 1992 and granted April 16, 1997. A European patent lasts at most 20 years from filing, so its term ended November 12, 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 May 12, 2018.
  • 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 12, 1992
PublishedMay 19, 1993
GrantedApril 16, 1997
Term endedNovember 12, 2012
Application numberEP 92119386
Classification (CPC)H10D30/0316 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedNov 12, 1992PublishedMay 19, 1993Patent grantedApril 16, 1997Term endedNov 12, 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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