US Patent Issued to Canon on Dec. 9 for "External additive particles, toner, and method for producing external additive particles" (Japanese Inventors)

ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,493,250, issued on Dec. 9, was assigned to Canon K.K. (Tokyo).

"External additive particles, toner, and method for producing external additive particles" was invented by Jun Shirakawa (Saitama, Japan), Akio Maruyama (Tokyo), Kei Inoue (Kanagawa, Japan), Waka Hasegawa (Tokyo) and Yukio Nagase (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "External additive particles including a polymer containing a sulfur atom and a nitrogen atom, wherein the polymer includes a vinyl polymer moiety and a siloxane moiety, relative to a total number of carbon atoms, oxygen atoms, and silicon atoms constituting the external additive particles, a ratio of a number of t...