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Expired European patentEurope

Method of forming amorphous silicon film

EP 0125318 B1 · Applicant: MITSUI TOATSU CHEMICALS, Inc.

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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 15, 1983 and granted May 29, 1991. A European patent lasts at most 20 years from filing, so its term ended November 15, 2003.
  • 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 15, 2009.
  • 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 15, 1983
PublishedNovember 21, 1984
GrantedMay 29, 1991
Term endedNovember 15, 2003
Application numberEP 83903575
Classification (CPC)H10P14/2922 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedNov 15, 1983PublishedNov 21, 1984Patent grantedMay 29, 1991Term endedNov 15, 2003

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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