ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,354, issued on June 24, was assigned to KAO Corp. (Tokyo).
"Aqueous pigment dispersion" was invented by Tomohiko Nagano (Wakayama, Japan), Hiroto Soma (Wakayama, Japan) and Shu Nagashima (Wakayama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pigment water dispersion including pigment-containing polyester resin particles. An alcohol component as a raw material monomer of the polyester resin satisfies the following conditions 1 and 2. Condition 1: a content of a compound (I) represented by the following formula (I) in the alcohol component is not more than 7 mol %,wherein OR1 and R2O are each independently an oxyalkylene group comprising no...