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Expired European patentEurope

A process for reactive ion etching a polymer film

EP 0154675 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 August 29, 1984 and granted December 16, 1992. A European patent lasts at most 20 years from filing, so its term ended August 29, 2004.
  • 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 March 1, 2010.
  • 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.
FiledAugust 29, 1984
PublishedSeptember 18, 1985
GrantedDecember 16, 1992
Term endedAugust 29, 2004
Application numberEP 84110267
Classification (CPC)G03F1/20 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedAug 29, 1984PublishedSep 18, 1985Patent grantedDec 16, 1992Term endedAug 29, 2004

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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