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Expired European patentEurope

Method for producing pigment transparent preparations based on perylene-3,4,9,10-tetracarboxylic acid diimine

EP 1597323 B1 · Applicant: Clariant GmbH

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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 31, 2004 and granted December 20, 2006. A European patent lasts at most 20 years from filing, so its term ended January 31, 2024.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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 31, 2004
PublishedNovember 23, 2005
GrantedDecember 20, 2006
Term endedJanuary 31, 2024
Application numberEP 04707135
Classification (CPC)C09B67/0033 +1 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedJan 31, 2004PublishedNov 23, 2005Patent grantedDec 20, 2006Term endedJan 31, 2024

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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