US Patent Issued to SEIKO EPSON on May 27 for "Ink jet ink composition, recording method, and recorded matter" (Japanese Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,485, issued on May 27, was assigned to SEIKO EPSON Corp. (Japan).

"Ink jet ink composition, recording method, and recorded matter" was invented by Kenta Kikuchi (Suwa, Japan), Hiroaki Kumeta (Matsumoto, Japan), Satoshi Tsubamoto (Shiojiri, Japan) and Koji Imamura (Shiojiri, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An ink jet ink composition is a water-based ink jet ink composition and includes a vegetable black-derived colorant, a lignosulfonate salt, and an element A which includes at least one selected from the group consisting of Ca, Mg, Mn, Fe, Al, Si, Cr, Ni, Sr, and Ba, and a content of the element A with respect to a total mass of...