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. 15, 2020
Filed:
Aug. 07, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Kentaro Kamae, Kashiwa, JP;
Ryuji Murayama, Nagareyama, JP;
Junichi Tamura, Toride, JP;
Masaharu Miura, Toride, JP;
Hayato Ida, Toride, JP;
Takaho Shibata, Tokyo, JP;
Koh Ishigami, Abiko, JP;
Yuichi Mizo, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner includes a toner particle containing a binder resin and a silica fine particle A on a surface of the toner particle, wherein D50 on a number basis of the toner is 3.0 to 6.0 the silica fine particle A is a particle having a particle diameter of 80 to 500 nm, the particle diameter being confirmable by observing the toner with a SEM, and when the average coverage with the silica fine particle A determined by image analysis of a particle group of a small particle diameter side of the toner with a SEM is set to Sand the average coverage with the silica fine particle A determined by image analysis of a particle group of a large particle diameter side of the toner with a scanning electron microscope is set to S, Sis 20 to 70 area %, Sand Ssatisfy S/S≤0.80.