US Patent Issued to SEIKO EPSON on May 20 for "Dispersion liquid, ink composition for ink jet recording, and dispersion resin" (Japanese Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,068, issued on May 20, was assigned to SEIKO EPSON Corp. (Japan).

"Dispersion liquid, ink composition for ink jet recording, and dispersion resin" was invented by Hajime Kakishita (Shiojiri, Japan), Mami Tojino (Shiojiri, Japan), Toshihiro Otake (Chino, Japan), Koichi Terao (Suwa, Japan), Hiroshi Ito (Matsumoto, Japan) and Koji Horiba (Matsumoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A dispersion liquid includes water, a coloring material, a dispersion resin that disperses the coloring material, and a compound having s sulfonate group and a polymerizable group. The dispersion resin has a constituent unit A containing a hydrophobic mon...