ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,938, issued on April 15, was assigned to CANON K.K. (Tokyo).
"Toner" was invented by Mayumi Inoue (Shizuoka, Japan), Takashi Kenmoku (Shizuoka, Japan), Yoshiaki Shiotari (Shizuoka, Japan) and Shohei Kototani (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A toner, comprising a toner particle, wherein the toner particle has a core-shell structure comprising a core particle and a shell on a surface of the core particle, the shell comprises a polymer having monomer units represented by Formula (I) below, the toner comprises a specific external additive A, the external additive A is at least one selected from the group consisting of silic...