Back to results
US 4,004,929 AGranted
Color corrected photographic elements
AssigneeEastman Kodak Company
InventorRoy L. Orvis
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeEastman Kodak Company
InventorRoy L. Orvis
Estimating the term…
Photographic elements containing at least one silver halide emulsion layer in which there is incorporated a cyan-color forming material which, upon reaction with oxidized color developer, forms a cyan dye having unwanted absorption in the green and blue regions of the visible spectrum can be color corrected to a surprising degree by the incorporation into said element of a colored coupler compound having the structure: ##STR1## wherein R.sup.2 is an alkyl group containing 1 to 6 carbon atoms, R.sup.3 and R.sup.4 are independently selected and are alkyl groups containing 2 to 6 carbon atoms, B is hydrogen or CooR.sup.6 wherein R.sup.6 is an alkyl group containing 1 to 8 carbon atoms, and A is a sulfonated naphthylazo group selected from those having the structure: ##STR2## wherein R.sup.5 is an alkyl group containing 1 to 4 carbon atoms, M is photographically inactive, M is a monovalent cation.
In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated in said layer (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color developing agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent;
In a photographic element comprising a support and at least one silver halide emulsion layer coated on said support and containing, incorporated therein, (a) at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic amino color development agent, and (b) at least one colored coupler compound capable of forming a cyan dye upon reaction with said color developing agent;
In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent;
In a photographic element comprising a support and at least one silver halide emulsion layer containing, incorporated in said layer, at least one naphtholic coupler capable of forming a cyan dye upon reaction with oxidized aromatic color developing agent;
Dependencies are inferred from the claim text.