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Expired European patentEurope

Processing of silver halide color photographic light-sensitive material

EP 0475768 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 September 12, 1991 and granted December 10, 1997. A European patent lasts at most 20 years from filing, so its term ended September 12, 2011.
  • 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 March 12, 2017.
  • 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.
FiledSeptember 12, 1991
PublishedMarch 18, 1992
GrantedDecember 10, 1997
Term endedSeptember 12, 2011
Application numberEP 91308351
Classification (CPC)G03C7/3022 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedSep 12, 1991PublishedMarch 18, 1992Patent grantedDec 10, 1997Term endedSep 12, 2011

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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