US Patent Issued to CANON on May 20 for "Toner" (Japanese Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,579, issued on May 20, was assigned to CANON K.K. (Tokyo).

"Toner" was invented by Kazuyuki Sato (Kanagawa, Japan), Tomohisa Sano (Shizuoka, Japan), Daisuke Yoshiba (Shizuoka, Japan) and Tohru Hiramatsu (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The toner is a toner including a toner particle comprising a binder resin, a crystalline material, wherein, when a ratio of an area occupied by the crystalline material in a toner surface observed with a scanning electron microscope after ruthenium-staining the toner under a specific condition (1) is represented by S1 (%), a ratio of an area occupied by the crystalline material in the to...