ALEXANDRIA, Va., April 7 -- United States Patent no. 12,596,315, issued on April 7, was assigned to CANON K.K. (Tokyo).
"Toner" was invented by Taiji Katsura (Shizuoka, Japan), Masatake Tanaka (Kanagawa, Japan), Dai Nozaki (Shizuoka, Japan) and Shintaro Kawaguchi (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A toner comprising a toner particle and an external additive, wherein the toner particle comprises a core comprising a resin A and a shell comprising a resin B on the surface of the core, the external additive comprises a hydrotalcite particle A, fluorine and aluminum are present in an inner part of the hydrotalcite particle A in line analysis in STEM-EDS mapping analysis of the toner, ...