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:
Dec. 29, 2020
Filed:
Jun. 12, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Kenta Kamikura, Yokohama, JP;
Takashi Matsui, Mishima, JP;
Kenji Aoki, Numazu, JP;
Masao Suzuki, Kawasaki, JP;
Tsutomu Shimano, Mishima, JP;
Reo Tagawa, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
The toner has a toner particle in which a toner core containing a binder resin is coated with a shell layer, wherein the binder resin contains a polymer A that has a first monomer unit and a second monomer unit; the first unit is derived from (meth)acrylate ester having an alkyl group having 18 to 36 carbon atoms; the content of the first monomer unit in the polymer is 5.0 to 60.0 mol %; the content of the second monomer unit is 20.0 to 95.0 mol %; the following formula (1) is satisfied when the SP value of the first unit is denoted by SPand the SP value of the second unit is denoted by SP; and the toner core is coated with a highly uniform shell over at least 90% of the circumference of the toner cross section;3.00≤()≤25.00  (1).