US Patent No. 9,134,639

MAGENTA TONER


Patent No. 9,134,639
Issue Date September 15, 2015
Title Magenta Toner
Inventorship Masao Nakano, Kamakura (JP)
Taichi Shintou, Saitama (JP)
Yutaka Tani, Yokohama (JP)
Takayuki Ujifusa, Ashigarakami-gun (JP)
Kaoru Takahashi, Saitama (JP)
Satoshi Saito, Mishima (JP)
Takeshi Miyazaki, Ebina (JP)
Masashi Hirose, Machida (JP)
Assignee CANON KABUSHIKI KAISHA, Tokyo (JP)

Claim of US Patent No. 9,134,639

1. A magenta toner comprising magenta toner particles each comprising a binder resin and a colorant, wherein
the colorant comprises a compound represented by a formula (1):

wherein R1 and R2 represent an alkyl group or an alkoxyalkyl group, and at least one of R1 and R2 has not less than 7 carbon atoms.