ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,972, issued on Jan. 20, was assigned to CANON K.K. (Tokyo).
"Toner" was invented by Dai Nozaki (Shizuoka, Japan), Yoshitaka Suzumura (Shizuoka, Japan) and Tomohiro Unno (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A toner comprising a toner particle comprising a binder resin, a nonmagnetic inorganic oxide particle A, and a magnetic iron oxide particle B, wherein a softening point of a chloroform-soluble component of the toner particle is not greater than 90deg C.; the nonmagnetic inorganic oxide particle A and the magnetic iron oxide particle B are internally added to the toner particle; the nonmagnetic inorganic oxide particle A ...