Patent ID: 7732509

Claim:
An ink composition comprising a polymeric colorant in a carrier, wherein the polymeric colorant is represented by General Formula I: wherein: R is independently hydrogen or a monovalent cation; R1 and R2 we independently selected from H, alkyl and aryl groups; each X is independently: O, N, O—R4-O, N—R4-O, O—R4-S, or an N— R4-S group, wherein R4 is selected from any alkyl, aryl, or heteroatom-containing aromatic or aliphatic ring groups; n, m, o and p represent the molar fractions of the distinct molecular units resulting from the reaction of the maleic anhydride units of the copolymer with specified reactants; where m+o+p=1, m=0.05−0.7, o=0.1−0.8, and p=0−0.5, where n is a number between 1 and 6; Chrom is a dye chromophore; and R3 is selected from any branched, linear or cyclic alkyl group having from 8 to 24 carbons.