ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,480, issued on May 27, was assigned to Canon K.K. (Tokyo).
"Aqueous ink, ink cartridge and ink jet recording method" was invented by Yoko Uetake (Kanagawa, Japan), Akemi Watanabe (Kanagawa, Japan) and Yoshio Nakajima (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an aqueous ink that has excellent ejection stability and that can be used to record an image with excellent abrasion resistance and an ink cartridge and an ink jet recording method that use the aqueous ink. The aqueous ink is an aqueous ink for ink jet containing a pigment, an organic solvent and a resin particle formed of a polyester resin or a urethane resin. ...