US Patent Issued to KAO on March 31 for "Aqueous pigment dispersion" (Japanese Inventor)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,217, issued on March 31, was assigned to KAO Corp. (Tokyo).

"Aqueous pigment dispersion" was invented by Teruyuki Fukuda (Wakayama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A water-based pigment dispersion including an aluminum lake pigment (A) and a pigment dispersant (B). The pigment dispersant (B) is a polymer containing a constituent unit derived from an anionic group-containing monomer (b-1) and a constituent unit derived from a hydrophilic nonionic monomer (b-2) containing an oxyalkylene group. A water-based ink for ink-jet recording, including the water-based pigment dispersion and a water-soluble organic solvent (C)."

The paten...