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Expired Canadian patentCanada

Method of processing light-sensitive silver halide color photographic material

CA 1287770 C · Owner: Kurematsu, Masayuki · Inventors: Koboshi, Shigeharu; Kurematsu, Masayuki

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Abstract From the Canadian patent

A method of processing a light-sensitive silver halide color photographic material, comprising color developing a light-sensitive silver halide color photographic material and thereafter processing it with a processing solution having fixing ability, followed by processing with a water-washing substitute stabilizing solution in a processing tank or tanks comprising 1 to 4 tanks wherein, said water-washing substitute stabilizing solution contains at least one of the compounds represented by Formula (I) shown below and at least one of nitrilotriacetic acid and the compounds represented by Formula (II) shown below:, Formula (I) wherein R represents a hydrogen atom or an alkyl group having 1 to …

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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 August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 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.
FiledMarch 26, 1986
GrantedAugust 20, 1991
Term endedAugust 20, 2008
Patent numberCA 1287770 C
Classification (IPC)G03C5/38 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMarch 26, 1986Patent grantedAug 20, 1991Term endedAug 20, 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.