ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,084, issued on Sept. 22, was assigned to Canon K.K. (Tokyo).
"Aqueous ink, ink cartridge and ink jet recording method" was invented by Katsutoshi Sekino (Kanagawa, Japan), Satoru Kobayashi (Kanagawa, Japan) and Hiroshi Kakikawa (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an aqueous ink for ink jet capable of recording an image excellent in abrasion resistance and color developability. The aqueous ink for ink jet contains: a pigment; a wax; a phosphate ester-based surfactant; and an amine compound. The pigment is a pigment dispersed through an action of at least one kind selected from the group consisting of: a carbox...