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US 4,540,657 AGranted
Photographic coupler solvents and photographic elements employing same
AssigneeEastman Kodak Company
InventorSundaram Krishnamurthy
Life of this patent
Estimating the term…
Abstract
Photographic coupler solvents having at least one terminal epoxy group and at least one ester or amide group are described for incorporation in photographic emulsions and elements. The solvents are preferably employed in the magenta layer to reduce background stain produced by exposure to light, heat and humidity.
Claims12
A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler dispersed in a nonpolymeric coupler solvent therefor which has at least one terminal epoxy group and at least one ester or amide group.
Dependencies are inferred from the claim text.