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Expired European patentEurope

Solvent mixture for the development of lithographic printing plates, without organic solvents and having an extremely neutral pH

EP 0279164 B1 · Applicant: HOECHST CELANESE 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 January 7, 1988 and granted November 14, 1990. A European patent lasts at most 20 years from filing, so its term ended January 7, 2008.
  • 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 July 7, 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.
FiledJanuary 7, 1988
PublishedAugust 24, 1988
GrantedNovember 14, 1990
Term endedJanuary 7, 2008
Application numberEP 88100100
Classification (CPC)G03F7/322

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJan 7, 1988PublishedAug 24, 1988Patent grantedNov 14, 1990Term endedJan 7, 2008

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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