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:
Aug. 25, 2026
Filed:
Nov. 16, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Junichi Tamura, Ibaraki, JP;
Ichiro Kanno, Chiba, JP;
Yukihiro Abe, Chiba, JP;
Mari Kaburagi, Chiba, JP;
Hayato Ida, Ibaraki, JP;
Masao Suzuki, Kanagawa, JP;
Kei Inoue, Kanagawa, JP;
Waka Hasegawa, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
The external additive for toner includes an external additive particle containing: a base particle A; and a plurality of convex forming particles B each configured to form a convex portion on a surface of the base particle A. The base particle A and the convex forming particles B are particles each containing a silicon compound having a siloxane bond, and a chemical bond is formed between the base particle A and each of the convex forming particles B. The base particle A and the convex forming particles B each have a total content of the following unit (a), unit (b), and unit (c) of 80 mass % or more and 100 mass % or less: where Rand Reach represent an alkyl group having 1 or more and 6 or less carbon atoms.