US Patent Issued to Nippon Kayaku on Sept. 1 for "Ink composition and inkjet-recording method" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,412, issued on Sept. 1, was assigned to Nippon Kayaku K.K. (Tokyo).

"Ink composition and inkjet-recording method" was invented by Yukio Sasazawa (Tokyo), Ha Sai (Tokyo), Shogo Toda (Tokyo) and Tetsuya Iwazaki (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An ink composition including a water-insoluble coloring agent, a dispersing agent, a resin A, a resin B, and water, in which the resin A is obtained through polymerization of at least a C1-C4 alkyl methacrylate and a C2-C6 alkyl acrylate, and the resin B is obtained through polymerization of at least a styrene-based monomer and divinyl benzene. An inkjet-recording method in which the ink com...