Dye-forming photographic material and process comprising bleach accelerator releasing compound
CA 1287765 C · Owner: Stephen, Keith Henry · Inventors: Hall, Jeffrey Louis; Romanet, Robert Fogg; Kilminster, Kenneth Norman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Bleach accelerator releasing organic compounds which have a releasable bleach accelerator moiety represented by the moiety:, -(TIME)n-S-R1-R2 wherein, TIME is a timing group;, n is 0 or 1; R1 is a linking group; and, R2 is a water solubilizing group are useful in dye-forming photographic elements and processes. The bleach accelerator releasing compound enables improved images by means of release of the bleach accelerator moiety in the photographic element during processing.
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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 August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 2008.
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Timeline
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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.