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Expired European patentEurope

The use of pyrazolo-triazole photographic colour couplers

EP 0460008 B1 · Applicant: EASTMAN KODAK COMPANY

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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 February 14, 1990 and granted June 5, 1996. A European patent lasts at most 20 years from filing, so its term ended February 14, 2010.
  • 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 August 14, 2015.
  • 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.
FiledFebruary 14, 1990
PublishedDecember 11, 1991
GrantedJune 5, 1996
Term endedFebruary 14, 2010
Application numberEP 90903197
Classification (CPC)G03C7/3835

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedFeb 14, 1990PublishedDec 11, 1991Patent grantedJune 5, 1996Term endedFeb 14, 2010

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.