ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,740, issued on Jan. 13, was assigned to KAO Corp. (Tokyo).
"Aqueous pigment dispersion" was invented by Tomohiko Nagano (Wakayama, Japan), Shimpei Kobayashi (Wakayama, Japan), Hiroto Soma (Wakayama, Japan), Shu Nagashima (Wakayama, Japan) and Yuki Ozaki (Wakayama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pigment water dispersion, including pigment-containing polyester resin particles. The polyester resin contains a constitutional unit derived from an alcohol component and a constitutional unit derived from a carboxylic acid component, the alcohol component contains 3-methyl-1,5-pentanediol, and an average particle size of the pigment-c...