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:
Jul. 07, 2026
Filed:
Apr. 27, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroki Kagawa, Shizuoka, JP;
Tomohisa Sano, Shizuoka, JP;
Tohru Hiramatsu, Shizuoka, JP;
Kazuyuki Sato, Kanagawa, JP;
Shohei Shibahara, Shizuoka, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner comprising a toner particle comprising a magnetic body, and a silica fine particle on a surface of the toner particle, wherein fragment ions corresponding to a D unit structure are observed in a specific measurement; when the silica fine particle is dispersed in a mixed solution of ethanol and aqueous solution of NaCl, followed by a titration operation using sodium hydroxide, a titer is within a specific range; in a chemical shift obtained by a specific measurement, with D as an area of a peak having a peak top present in a range from −25 to −15 ppm, and with D1 as an area of a peak having a peak top present in a range of more than −19 ppm and −17 ppm or less, D and D1 are in a specific ratio; and the magnetic body is present on the surface of the toner particle.