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. 08, 2020
Filed:
Aug. 26, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Takeshi Ohtsu, Toride, JP;
Tadashi Fukuda, Tokyo, JP;
Mikihiro Akasaki, Matsudo, JP;
Akinori Miyamoto, Bando, JP;
Kota Mori, Abiko, JP;
Masami Hano, Abiko, JP;
Takashi Kase, Tokyo, JP;
Daisuke Tsujimoto, Tokyo, JP;
Ryuichiro Matsuo, Moriya, JP;
Kazuto Hosoi, Abiko, JP;
Yoshihiro Ogawa, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner includes toner particle containing at least a strontium titanate particle on the surface of the toner particle, and the toner is a water-washed toner from which strontium titanate particle desorbable by water washing are removed by water washing. The water-washed toner contains the strontium titanate particle having a number average particle diameter of primary particle (D1) of 10 nm or more and 150 nm or less, and when the distribution of an Sr element in the water-washed toner in the depth direction is determined, (i) the Sr element abundance on the outermost surface x satisfying 0.00<x≤0.80, and (ii) the difference between x and xp 'xp−x' satisfying 0.00<xp−x≤0.95, where xp is the maximum peak value (atomic %) of the Sr element abundance in the region from the outermost surface to 50 nm.