ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,046, issued on May 20, was assigned to SEIKO EPSON Corp. (Japan).
"Ink jet ink composition and ink jet printing method" was invented by Kei Hiruma (Chino, Japan), Mitsunobu Nakatani (Shiojiri, Japan), Tomoyuki Ushiyama (Chino, Japan) and Kenta Tsukada (Shiojiri, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink jet ink composition contains a metal pigment and at least one liquid medium selected from the group consisting of organic solvents and water. The metal pigment is surface-modified with a surface treatment agent. The metal pigment is in the form of scale-like particles and has a volume average particle size D50 of 1.0 micro metre or ...