Patent ID: 6143485
Filing Date: 2000-11-07
Classification: G03C

Abstract:
A photographic element comprising a support bearing at least one photographic silver halide emulsion layer having associated therewith a dye-forming coupler of the formula: ##STR13## wherein: Z.sub.a is --N=and Z.sub.b is ##STR14## to which ring ""A"" is directly attached; R.sup.0 represents a methyl or t-butyl group;R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen or substituents, provided that any two R.sup.1 groups, any two R.sup.4 groups or R.sup.2 and R.sup.3 may form a ring;L represents a divalent linking group;B represents a substituted or unsubstituted sulfonamido or sulfamoyl group;D represents a substituted or unsubstituted alkyl, aryl, carbocyclic or heterocyclic group;X represents hydrogen or a coupling-off group;p and m independently represent integers from 0 to 4; and n represents 0 or 1.