ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,468,236, issued on Nov. 11, was assigned to CANON K.K. (Tokyo).
"External additive for toner, and toner" was invented by Yuzo Seino (Shizuoka, Japan), Daisuke Yoshiba (Shizuoka, Japan), Koki Inoue (Shizuoka, Japan) and Yuki Masuda (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An external additive for a toner comprising a silica particle surface-treated with a polyhydric acid metal salt particle, wherein the polyhydric acid metal salt particle is particle of a salt of a polyhydric acid and a titanium compound, and a toner comprising a toner particle, and an external additive for a toner on the surface of the toner particle, wherein the ...