Patent ID: 7736426

Claim:
A phase change ink composition comprising a phase change ink carrier and a colorant compound of the formula wherein R 1 , R 2 , R 3 , and R 4 each, independently of the others, is (i) a hydrogen atom, (ii) an alkyl group, (iii) an aryl group, (iv) an arylalkyl group, or (v) an alkylaryl group, wherein R 1 and R 2 can be joined together to form a ring, wherein R3 and R 4 can be joined together to form a ring, and wherein R 1 , R 2 , R 3 , and R 4 can each be joined to a phenyl ring in the central structure; wherein a and b each, independently of the others, is an integer which is 0, 1, 2, or 3, wherein R 5 and R 6 are hydrogen or alkyl; wherein A is an anion; wherein CA is either a hydrogen atom or a cation; wherein R is (i) an alkyl group, (ii) an aryl group, (iii) an arylalkyl group, (iv) an alkylaryl group, (v) an alkoxy group, (vi) an acetate group, or (vii) a co-polymer of maleic anhydride; wherein n is an integer which is about 1 to about 1,000; and wherein m is an integer which is about 1 to about 1,000.