ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,443,120, issued on Oct. 14, was assigned to CANON K.K. (Tokyo).
"Toner" was invented by Yoshitaka Suzumura (Shizuoka, Japan) and Tomoko Sugita (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A toner comprising a toner particle, and an external additive on a surface of the toner particle, wherein the external additive comprises an agglomerate of fine silica particles surface-treated with silicone oil; when a number-average particle diameter of the agglomerate of the fine silica particles is defined as Rb, the Rb is 12 to 80 nm; when an integrated value of a D unit is defined as A, which obtained when an integrated value of a Q unit is set...