ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,481, issued on May 27, was assigned to Canon K.K. (Tokyo).
"Aqueous ink, ink cartridge and ink jet recording method" was invented by Misaki Sugie (Kanagawa, Japan) and Yuki Nishino (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an aqueous ink for ink jet that can record an image excellent in a color developability by suppressing a bronze phenomenon derived from a carbon black. The aqueous ink for ink jet contains: a self-dispersible carbon black; and a resin particle formed of an acrylic resin. The carbon black has a DBP oil absorption of 120 mL/100 g or more, the acrylic resin particle has a glass transition temperature of 30deg ...