Silver halide color photographic light-sensitive material
CA 1249474 A · Owner: Konishiroku Photo Industry Co. Ltd. · Inventors: Sasaki, Takashi; Kimura, Toshihiko; Kaneko, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The silver halide color photographic light-sensitive material comprises a support having thereon a lightsensitive silver halide emulsion layer. The latter said silver halide photographic light-sensitive material contains a phenol-type cyan coupler having at the second position of the benzene nucleus thereof a group selected from the group consisting of a phenyl-ureido group, a naphthyl ureido group and a heterocyclic ureido group, and having at the fifth position thereof an acylamino group. The lightsensitive silver halide emulsion layer and a light-sensitive silver halide emulsion layer other than said light-sensitive silver halide emulsion layer or either of the two emulsion layers …
Read the whole patent
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 January 31, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.