ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,840, issued on Aug. 19, was assigned to SEIKO EPSON Corp. (Japan).
"Ink jet ink composition and recording method" was invented by Hiroaki Kumeta (Matsumoto, Japan) and Kenta Kikuchi (Suwa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink jet ink composition includes water, a plant-derived carbonized color material, and a lignin resin."
The patent was filed on April 22, 2022, under Application No. 17/726,575.
*For further information, including images, charts and tables, please visit: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=12391840&OS=123...