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:
Apr. 28, 2026
Filed:
Apr. 27, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Ryuichiro Matsuo, Ibaraki, JP;
Toru Takahashi, Ibaraki, JP;
Daisuke Tsujimoto, Tokyo, JP;
Shin Kitamura, Ibaraki, JP;
Ryuji Murayama, Chiba, JP;
Hitoshi Sano, Chiba, JP;
Nobuyuki Fujita, Tokyo, JP;
Shuji Yamada, Chiba, JP;
Yuka Gunji, Ibaraki, JP;
Takakuni Kobori, Ibaraki, JP;
Yoshihiro Ogawa, Ibaraki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner comprising a toner particle and a 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; the silica fine particle A comprises a silicone oil and a carbon loss ratio when the silica fine particle A is washed with hexane is 5 to 70%; and an area of each peak obtained in a solid-state CP/MASSi-NMR measurement of the silica fine particle A and of the silica fine particle A after washing thereof with hexane is in a specific range.