US Patent Issued to DAINICHISEIKA COLOR & CHEMICALS on Feb. 24 for "Polymeric dispersant and production method therefor, aqueous pigment dispersion, and water-based ink-jet ink" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,639, issued on Feb. 24, was assigned to DAINICHISEIKA COLOR & CHEMICALS MFG. Co. LTD. (Tokyo).

"Polymeric dispersant and production method therefor, aqueous pigment dispersion, and water-based ink-jet ink" was invented by Hiroyuki Shimanaka (Tokyo), Katsuhiko Kano (Tokyo), Kosuke Kume (Tokyo), Chikako Miyazaki (Tokyo), Yoshikazu Murakami (Tokyo) and Sachio Yoshikawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a polymeric dispersant that is to be blended in an aqueous pigment dispersion in which a pigment is finely dispersed in a stable manner and at a high level, the aqueous pigment dispersion enabling prepar...