Silver halide photosensitive materials for color photography
CA 1292137 C · Owner: Konishiroku Photo Industry Co. Ltd. · Inventors: Sugita, Hiroshi; Sato, Ryosuke; Sasaki, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Silver halide photosensitive materials for color photography, There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: Ball-CONH, NHCONH, wherein the substituents X1 X2, Y, Z and n are as, defined in the specification and claim of this application. The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 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.
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.