ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,355, issued on June 24, was assigned to SEIKO EPSON Corp. (Japan).
"Ink jet composition and ink jet recording method" was invented by Nikako Tsukiji (Matsumoto, Japan), Soichi Yamazaki (Shiojiri, Japan), Koichi Terao (Suwa, Japan), Harunobu Komatsu (Matsumoto, Japan) and Koji Horiba (Atsugi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink jet composition of the present disclosure includes water; a polyester resin having sulfo groups; and a colorant, the colorant is contained in particles formed from a material containing the polyester resin, and the particles have an average particle diameter of 100 nm or less and are contained in the in...