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:
Jun. 07, 2011
Filed:
Feb. 19, 2009
Motoko Sakai, Kanagawa, JP;
Masahiro Takagi, Kanagawa, JP;
Jun Igarashi, Kanagawa, JP;
Tetsuya Taguchi, Kanagawa, JP;
Motoko Sakai, Kanagawa, JP;
Masahiro Takagi, Kanagawa, JP;
Jun Igarashi, Kanagawa, JP;
Tetsuya Taguchi, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A toner for developing an electrostatic image includes a toner particle to which particles of an external additive A having a number average particle diameter of from 7 nm to 200 nm and particles of an external additive B having a number average particle diameter of from 30 nm to 4000 nm have been externally added. The ratio of the number average particle diameter of the particles of the external additive B to the number average particle diameter of the particles of the external additive A is in a range of from 2 to 20. The particles of one of the external additive A or the external additive B are particles having a core material covered with an organic material containing hydrogen and nitrogen. The particles of the other one of the external additive A or the external additive B are SiOparticles.