Photographic element and process comprising a dye releasing group
CA 1314543 C · Owner: Mooberry, Jared Ben · Inventors: Mooberry, Jared Ben; Singer, Stephen Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A new photographic coupler comprises a coupling-off group bonded to the coupler at the coupling position represented by the formula: -L-NR1-DYE, wherein L is a linking group; NR1 is a substituted nitrogen atom bonded to DYE that together with NR1 is a releasable dye comprising an electrically neutral chromophore. Such a coupler enables dye hue stabilization without mordanting the dye formed. Such a new coupler is useful in a photographic silver halide element and process to provide increased dye density higher contrast dye images, and lower pH sensitivity upon 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 March 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 16, 2010.
- 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.