ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,821, issued on June 3, was assigned to SANYO CHEMICAL INDUSTRIES LTD. (Kyoto, Japan) and SEIKO EPSON Corp. (Tokyo).
"Aqueous pigment dispersion" was invented by Hiroshi Odajima (Kyoto, Japan), Takeshi Yano (Suwa-Gun Fujimi-Machi, Japan), Kenji Kitada (Shiojiri, Japan) and Shinichi Naito (Chino, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an aqueous pigment dispersion having high initial dispersibility, high storage stability, and high color developability after printing, and particularly having high rub resistance (rubbing fastness) in cotton fabrics. An aqueous pigment dispersion for an aqueous inkjet ink, including a pigment an...