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Expired European patentEurope

Method for making polycrystalline silicon film resistors

EP 0090963 B1 · Applicant: International Business Machines Corporation

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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 March 15, 1983 and granted September 20, 1989. A European patent lasts at most 20 years from filing, so its term ended March 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 September 15, 2008.
  • 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.
FiledMarch 15, 1983
PublishedOctober 12, 1983
GrantedSeptember 20, 1989
Term endedMarch 15, 2003
Application numberEP 83102546
Classification (CPC)H10D1/47 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMarch 15, 1983PublishedOct 12, 1983Patent grantedSep 20, 1989Term endedMarch 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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