US Patent Issued to SEIKO EPSON on July 1 for "Water-based composition and coloring method" (Japanese Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,749, issued on July 1, was assigned to SEIKO EPSON Corp. (Japan).

"Water-based composition and coloring method" was invented by Mitsunobu Nakatani (Shiojiri, Japan), Kei Hiruma (Chino, Japan) and Tomoyuki Ushiyama (Chino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A water-based composition of the present disclosure includes a metal pigment, a polyoxyalkylene amine compound, and a water-based medium, in which the metal pigment is formed of a plurality of metal particles, the metal particles are surface-modified by a surface treatment agent, and a content of the polyoxyalkylene amine compound is 0.1 parts by mass or more and 50 parts by mass ...