ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,527, issued on Dec. 16, was assigned to Ricoh Co. Ltd. (Tokyo).
"Ink, image forming apparatus, and image forming method" was invented by Mayumi Yoshihara (Kanagawa, Japan), Michihiko Namba (Kanagawa, Japan), Takashi Tamai (Kanagawa, Japan), Shin Hasegawa (Tokyo), Yuta Nakamura (Kanagawa, Japan) and Daiki Hasebe (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ink contains water, a coloring material, a resin, and an organic solvent, wherein the dried layer of the ink has a surface free energy Gammas having a polar component Gammasp of from 3.5 to 20 J/m2 at 25 degrees C."
The patent was filed on Sept. 22, 2023, under Application No. 18/472,6...