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Expired European patentEurope

Polyvinyl acetal, light-sensitive composition containing it and reproduction material made therefrom

EP 0274075 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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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 December 10, 1987 and granted May 26, 1993. A European patent lasts at most 20 years from filing, so its term ended December 10, 2007.
  • 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 June 10, 2013.
  • 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.
FiledDecember 10, 1987
PublishedJuly 13, 1988
GrantedMay 26, 1993
Term endedDecember 10, 2007
Application numberEP 87118277
Classification (CPC)G03F7/021 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 10, 1987PublishedJuly 13, 1988Patent grantedMay 26, 1993Term endedDec 10, 2007

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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