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:
Sep. 30, 2014
Filed:
Jun. 24, 2011
Takeru Chiba, Tokyo, JP;
Hisashi Kurokawa, Tokyo, JP;
Takeru Chiba, Tokyo, JP;
Hisashi Kurokawa, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Abstract
An object of the present invention is to provide a toner for developing electrostatic images, which prevents a decrease in toner charge amount in the environment of high temperature and high humidity, prevents occurrence of fog and has excellent flowability. Provided is a toner for developing electrostatic images, comprising an external additive and colored resin particles comprising a binder resin and a colorant, wherein the external additive is core-shell type complex fine particles in which resin fine particles are covered with at least one inorganic component selected from the group consisting of silica, alumina, titania and zirconia, and the volume ratio of the inorganic component of the core-shell type complex fine particles is 45 to 75% by volume when the total volume of the core-shell type complex fine particles is 100% by volume.