ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,545,798, issued on Feb. 10, was assigned to artience Co. Ltd. (Tokyo) and TOYOCOLOR Co. LTD. (Tokyo).
"Water-based inkjet ink and printed matter" was invented by Kazushi Sunaoshi (Tokyo), Takanori Nomura (Tokyo) and Riho Morita (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A water-based inkjet ink comprising a pigment, a surfactant (A), and a water-soluble organic solvent (B), in which the surfactant (A) includes an acetylenediol surfactant (A1) having an ethylene oxide structure and a propylene oxide structure, and having an HLB value of 10 or less; the water-soluble organic solvent (B) includes an alkanediol (B1) having 3 to 5 carbon atoms, an...