The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 2019
Filed:
Nov. 29, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Takeshi Ohtsu, Toride, JP;
Yosuke Iwasaki, Abiko, JP;
Wakiko Katsumata, Kashiwa, JP;
Koh Ishigami, Abiko, JP;
Masaharu Miura, Toride, JP;
Kentaro Kamae, Kashiwa, JP;
Kenta Mitsuiki, Toride, JP;
Ryuichiro Matsuo, Moriya, JP;
Yuichi Mizo, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a magenta toner having a magenta toner particle containing a binder resin, a colorant, a wax, a wax dispersant, and a crystalline polyester, wherein the wax dispersant is a graft polymer in which a styrene acrylic resin is grafted to a hydrocarbon compound, and the styrene acrylic resin has a monomer unit having a saturated alicyclic group, the colorant contains C.I. Pigment Red 32, and when observing a cross-section of the magenta toner particle using a transmission electron microscope (TEM), crystals of the crystalline polyester are dispersed in the cross-section, and the number average value of maximum lengths of the crystals is 50 nm or less.