Silver halide photographic material
CA 1333131 C · Owner: Fuji Photo Film Co. Ltd. · Inventors: Yagihara, Morio; Matsushita, Tetsunori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silver halide photographic material composed of a support having thereon at least one silver halide photosensitive emulsion layer, at least one layer of the material containing a blocked photographic reagent precursor represented by formula (I):, (I) wherein X1 represents a divalent linking group containing a hetero atom bonded to the carbon atom provided, that X1 is linked to the carbon atom by a group other than , or -SSO2-; PUG represents a photographically useful group containing a hetero atom bonded to X1; W represents =N- or , ; Y1 represents hydrogen or a group capaable of being substituted; Z represents an atomic group necessary for forming a heterocyclic ring provided that when …
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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 November 22, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 22, 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.
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.