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Expired European patentEurope

Method for preventing an organic colored substance from fading by light, stabilized colored compositions and photographic elements and materials

EP 0286850 B1 · Applicant: KONICA 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 March 15, 1988 and granted May 19, 1993. A European patent lasts at most 20 years from filing, so its term ended March 15, 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 September 15, 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.
FiledMarch 15, 1988
PublishedOctober 19, 1988
GrantedMay 19, 1993
Term endedMarch 15, 2008
Application numberEP 88104072
Classification (CPC)G03C7/39268

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMarch 15, 1988PublishedOct 19, 1988Patent grantedMay 19, 1993Term endedMarch 15, 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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