ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,254, issued on April 15, was assigned to Ricoh Co. Ltd. (Tokyo).
"Inkjet printing method and inkjet printing apparatus" was invented by Kenta Hagiwara (Kanagawa, Japan), Shunsuke Horie (Kanagawa, Japan) and Hiroki Kobayashi (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An inkjet printing method including: discharging ink contained in an ink storage unit, from a nozzle of a nozzle forming surface of a discharging unit; and supplying the ink from the ink storage unit to the discharging unit. The ink includes specific components and satisfies a specific relation between dynamic surface tension and time. The supplying includes: forming ...