ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,239, issued on Feb. 4, was assigned to FUJIFILM Corp. (Tokyo).
"Ink composition, ink set, and image recording method" was invented by Naoko Nishimura (Kanagawa, Japan) and Naotaka Wachi (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink composition is an ink composition including titanium dioxide particles, metal oxide particles, a dispersant, and water, in which an average particle diameter of the titanium dioxide particles is 100 nm or greater, an average particle diameter of the metal oxide particles is smaller than the average particle diameter of the titanium dioxide particles, and the metal oxide particles are oxide particle...