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:
May. 26, 2026
Filed:
Apr. 27, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Daisuke Tsujimoto, Tokyo, JP;
Toru Takahashi, Ibaraki, JP;
Ryuichiro Matsuo, Ibaraki, JP;
Shin Kitamura, Ibaraki, JP;
Nobuyuki Fujita, Tokyo, JP;
Ryuji Murayama, Chiba, JP;
Hitoshi Sano, Chiba, JP;
Takakuni Kobori, Ibaraki, JP;
Yoshihiro Ogawa, Ibaraki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner which has a toner particle and silica fine particle A on a surface of the toner particle, wherein a weight average particle diameter of the toner is 4.0 to 15.0 μm, a carbon loss ratio when the silica fine particle A is washed with hexane is 5 to 70%, and a temperature at which a differential coefficient of a nine-point moving average of integrated values integrated from 35° C. reaches 4000 or more for an intensity of an obtained ion having a mass number (M/z) of 207 is 270° C. or higher, when mass spectrometry is carried out at a sampling interval of 0.4 seconds while heating the silica fine particle A under specific conditions.