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. 18, 2020
Filed:
Jan. 28, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Shuntaro Watanabe, Hadano, JP;
Tatsuya Saeki, Suntou-gun, JP;
Atsuhiko Ohmori, Yokohama, JP;
Shuhei Moribe, Mishima, JP;
Hiroki Akiyama, Suntou-gun, JP;
Kazumichi Nakahama, Suntou-gun, JP;
Katsuhisa Yamazaki, Numazu, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An external toner additive having a resin fine particle containing a crystalline resin and an inorganic fine particle embedded in the resin fine particle, wherein part of the inorganic fine particle is exposed on the surface of the resin fine particle, and in differential scanning calorimetry of the external toner additive, the maximum endothermic peak temperature T1 (° C.) during a first temperature increase and the maximum exothermic peak temperature T2 (° C.) during a first temperature decrease satisfy the formulae (1) to (3) below, with measurement performed between −40° C. and 150° C. at a rate of increase of 10° C./min during the first temperature increase and between 150° C. and −40° C. at a rate of decrease in temperature of 10° C./min during the first temperature decrease:1-2≤40.0  (1)50.0≤1≤120.0  (2)10.0≤2≤80.0  (3).