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. 27, 2019
Filed:
May. 14, 2018
Fuji Xerox Co., Ltd., Tokyo, JP;
Mona Tasaki, Kanagawa, JP;
Sakon Takahashi, Kanagawa, JP;
Moegi Iguchi, Kanagawa, JP;
Yutaka Saito, Kanagawa, JP;
Soutaro Kakehi, Kanagawa, JP;
Yuka Yamagishi, Kanagawa, JP;
FUJI XEROX CO., LTD., Tokyo, JP;
Abstract
An electrostatic charge image developing toner includes a toner particle; a strontium titanate particle that is externally added to the toner particle and that is doped with a metal element having an electronegativity of 1.3 or less; and a silica particle that is externally added to the toner particle, in which in a case where a detected peak intensity of a metal element having an electronegativity of 1.3 or less is Me-R, a detected peak intensity of strontium is Sr—R, a detected peak intensity of silicon is Si—R, and an element proportion of strontium is Sr—P, Conditions (1) to (3) are satisfied,0.08 kcps≤Me-R≤10 kcps,  (1)0.1%≤Sr—P≤3.0%, and  (2)0.15≤Sr—R/Si—R≤12.  (3)