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Expired European patentEurope

A method of ion implantation into a semiconductor substrate provided with an insulating film

EP 0010942 B1 · Applicant: FUJITSU 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 October 29, 1979 and granted April 28, 1982. A European patent lasts at most 20 years from filing, so its term ended October 29, 1999.
  • 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 April 29, 2005.
  • 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.
FiledOctober 29, 1979
PublishedMay 14, 1980
GrantedApril 28, 1982
Term endedOctober 29, 1999
Application numberEP 79302363
Classification (CPC)H10P30/22 +1 more

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedOct 29, 1979PublishedMay 14, 1980Patent grantedApril 28, 1982Term endedOct 29, 1999

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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