Appeal No. 2000-2149 2
Application No. 08/859,901
THE INVENTION
The invention is directed to an aqueous ink composition comprising a co-solvent
mixture of from about 5.0% to about 30.0% of a C2-C8 terminal alkanediol and a second
solvent selected from a group of solvents including polyethylene glycol. Each of the
solvents is present in a weight ratio of 5:95 to 95:5. Furthermore, the claimed subject
matter contains a proviso that when ethylene glycol is present, as the C2 - C8 terminal
alkanediol, the second solvent may not be polyethylene glycol. Additional limitations are
provided in the following illustrative claims.
THE CLAIMS
Claims 1, 20, and 32 are illustrative of appellants’ invention and are reproduced
below.
1. An aqueous ink composition suitable for use in ink jet printers comprising:
(a) from about 0.1% to about 20.0% by weight of a colorant;
(b) from about 0.001% to about 40.0% by weight of a polymeric
dispersant for said colorant;
(c) from about 40.0% to about 80.0% by weight of an aqueous carrier;
and
(d) from about 5.0% to about 30.0% by weight of a cosolvent mixture
comprising:
(1) C2-C8 terminal alkanediol or a mixture thereof; and
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