Silver halide photographic light-sensitive material
CA 1286904 C · Owner: Sugita, Shuichi · Inventors: Nakagawa, Satoshi; Sugita, Shuichi; Yoshimoto, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silver halide photographic light-sensitive material comprising at least one compound represented by the general formula I and a-t least one compound represented by the general formula XII:, I, (wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing heterocyclic ring which may have a substituent; X represents a hydrogen atom or a substituent capable of being split off upon reaction with an oxidation product of a color developing agent; and R represents a hydrogen atom or a substituent): XII, (wherein R21, R22 and R24 are independently selected from the group consisting of a hydrogen atom an alkyl group, a, cycloalkyl group, an alkenyl group an aryl …
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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 July 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 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.