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:
May. 17, 2011
Filed:
Jan. 10, 2008
Delian Yi, Wuhan, CN;
Lin Wu, Wuhan, CN;
Shunquan Zhu, Wuhan, CN;
Hubei Dinglong Chemical Co., Ltd., Wuhan, CN;
Abstract
This invention teaches a charge control agent and a toner containing such a charge control agent. It solves the problem in current toner processing technique of inadequate electrification, unequal quantity of electricity, spreading and bottom ash. The charge control agent comprising metal complex of tannin acid in which metal atoms have 2 to 4 valences and tannin acid as coordination sub structure. The toners mentioned above at least contains resin, dyestuff and charge control agent of the invention. The powered carbon specializes in excellence in electrification, environment influence retardant. It can obtain stable and high definition image without spreading and bottom ash troubling.