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Expired European patentEurope

Crosslinkable aqueous developable photoresist compositions and method for use thereof

EP 0543761 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 October 23, 1992 and granted June 14, 2000. A European patent lasts at most 20 years from filing, so its term ended October 23, 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 April 23, 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.
FiledOctober 23, 1992
PublishedMay 26, 1993
GrantedJune 14, 2000
Term endedOctober 23, 2012
Application numberEP 92480157
Classification (CPC)G03F7/038 +2 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedOct 23, 1992PublishedMay 26, 1993Patent grantedJune 14, 2000Term endedOct 23, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.