Yellow couplers for photographic elements and processes
AssigneeEastman Kodak Company
InventorsPhilip T. S. Lau, Danny R. Thompson, Frederick R. Green, III
Life of this patent
Estimating the term…
Abstract
Novel yellow image dye-forming couplers are disclosed. The couplers comprise an active open-chain keto-methylene group, an anilide group attached to the keto-methylene group, and a cyclic ether group attached to the keto-methylene group. The cyclic ether group comprises two oxygen atoms. Either the anilide group or the cyclic ether may carry a ballast group capable of immobilizing the coupler in the layer in which it is contained. Color photographic elements incorporating the novel couplers are also disclosed.
Claims16
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer in association with an image dye-forming coupler, said coupler comprising:
- an active open-chain keto-methylene group,
- an anilide group attached to said keto-methylene group, said anilide group comprising an organic group capable of immobilizing the coupler in the layer in which it is contained;
- and
- a dioxane group attached to said keto-methylene group.
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer in association with an image dye-forming coupler wherein the coupler is a yellow image dye-forming 1,3-dioxane-5-carbonyl acetanilide coupler.
Dependencies are inferred from the claim text.