US Patent Issued to CANON on Sept. 8 for "Fine particle, external additive for toners, and toner" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,390, issued on Sept. 8, was assigned to CANON K.K. (Tokyo).

"Fine particle, external additive for toners, and toner" was invented by Ichiro Kanno (Chiba, Japan), Hiroki Watanabe (Chiba, Japan), Mari Kaburagi (Chiba, Japan) and Hayato Ida (Ibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The fine particle is a silicon-containing fine particle, wherein the number-average diameter of the fine particle is 0.05 micro metre to 0.30 micro metre; the proportion of the silicon atom with reference to the total of the elements is at least 20% according to fluorescent x-ray measurement of the fine particle; and, with respect to the silicon atom pro...