Patent ID: 7947761

Claim:
An inkjet ink composition comprising: a) a liquid vehicle; b) a pigment comprising a colorant having the formula A-(B) x ; and c) a polymeric dispersant comprising a polymeric group and at least one group having the formula-LG-A′-(B) y (C) z , wherein LG is a linking group, the polymeric dispersant further comprising at least one pendant group attached to the polymeric group, wherein the pendant group comprises a group having the formula -NH-ALK2, wherein ALK2 is a C 1 -C 12 alkyl group; wherein A and A′ are organic chromophore groups; B, which can be the same or different on the pigment when x>1 or the same or different on the polymeric dispersant when y>1, is a substituent on A and A′; C, which can be the same or different when z>1, is a substituent on A′ and is different than B; x, y and z are 0, 1, 2, 3, or 4; and y is less than or equal to x; and wherein A and A′ are the same and the substituents on A and A′ are different.