ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,206, issued on June 17, was assigned to SAKATA INX Corp. (Osaka, Japan).
"Aqueous inkjet ink composition" was invented by Yoichi Sato (Osaka, Japan), Hiroyuki Konishi (Osaka, Japan) and Kazuki Moriyasu (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An aqueous inkjet ink composition contains a pigment, an alkali-soluble resin, a polyolefin resin emulsion, a basic compound, an aqueous medium, and a surfactant, wherein the alkali-soluble resin is a copolymer of acrylic acid/lauryl acrylate/styrene; a glass transition temperature of the alkali-soluble resin is 45deg C. to 95deg C.; an average grain size of the polyolefin resin emulsion is ...