US Patent Issued to DIC on July 21 for "C.I. pigment yellow 180, aqueous pigment dispersion for ink-jet ink, and aqueous pigment ink" (Japanese Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,784, issued on July 21, was assigned to DIC Corp. (Tokyo).

"C.I. pigment yellow 180, aqueous pigment dispersion for ink-jet ink, and aqueous pigment ink" was invented by Issei Masuko (Kamisu, Japan), Masaaki Tanaka (Kamisu, Japan), Masaki Hosaka (Kamisu, Japan), Shingo Saitou (Kamisu, Japan) and Miyuki Morishita (Kamisu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The aqueous pigment dispersion for IJ inks has excellent dispersion quality as well as high color strength and light fastness and is particularly suited for use as an U aqueous pigment ink. It includes C.I. Pigment Yellow 180, a block copolymer having an acid value of 10 or more a...