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Expired Canadian patentCanada

Light-sensitive silver halide photographic material feasible for rapid processing

CA 1329039 C · Owner: Konishiroku Photo Industry Co. Ltd. · Inventors: Onodera, Kaoru; Sakamoto, Eiichi; Miyoshi, Masanobu

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Abstract From the Canadian patent

The light-sensitive silver halide photographic material comprises a support and provided, thereon, at least one light-sensitive silver halide emulsion layer which contains silver halide grains having silver chloride content of 90 mole % or more and containing a gold compounds. A dye-forming coupler is dispersed therein by the use of a high boiling-point organic solvent having a dielectric constant of not more than 6Ø The photographic material also includes a compound represented by General Formula (S):, (S), wherein Q is a group of atoms necessary to complete a 5- or 6-membered heterocyclic ring or a 5- or 6-membered ring fused with a benzene ring and is a hydrogen atom, an alkali metal or …

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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 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 30, 1987
GrantedMay 3, 1994
Term endedMay 3, 2011
Patent numberCA 1329039 C
Classification (IPC)G03C7/26 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJuly 30, 1987Patent grantedMay 3, 1994Term endedMay 3, 2011

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