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Expired Canadian patentCanada

Method for processing silver halide color photographic light-sensitive material

CA 1284052 C · Owner: Konishiroku Photo Industry Co. Ltd. · Inventors: Kadota, Shinzi; Koboshi, Shigeharu; Higuchi, Moeko

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Abstract From the Canadian patent

A method of processing of a silver halide color photographic light-sensitive material is disclosed. The color photographic material to be processed comprises a support and photographic component layers including a bluesensitive, green-sensitive and red-sensitive silver halide emulsion layers, and at least one of the photographic emulsion layers comprises a silver halide containing 0.5 to mol% of silver iodide. The total thickness of the photographic component layers is from 8 to 25µ m and the swelling rate T1/2 of this layers is not more than 25sec. At least one of the emulsion layers contains a specific coupler. The color photographic material is processed with a bleach-fixing solution …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 24, 1986
GrantedMay 14, 1991
Term endedMay 14, 2008
Patent numberCA 1284052 C
Classification (IPC)G03C7/40 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 24, 1986Patent grantedMay 14, 1991Term endedMay 14, 2008

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.