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:
Apr. 24, 2007
Filed:
Apr. 22, 2004
Chul-hwan Kim, Daejon, KR;
Kyung Hee Kim, Seoul, KR;
Eui Joon Choi, Anyang-shi, KR;
Hyun-nam Yoon, Towaco, NJ (US);
Chul-Hwan Kim, Daejon, KR;
Kyung Hee Kim, Seoul, KR;
Eui Joon Choi, Anyang-shi, KR;
Hyun-Nam Yoon, Towaco, NJ (US);
DPI Solutions, Incorporated, Daejon, KR;
Abstract
A color toner composition for developing latent electrostatic images includes nanopowder-coated toner particles, the powder-coated toner particles being characterized in that each comprises a core toner particle having a volume average diameter, D, and the core toner particles have affixed to their surfaces a plurality of discrete colorant powder particles having a volume average diameter, d, wherein the ratio of D/dis at least about 5 and the weight fraction of colorant powder particles is at least about 0.01 based on the combined weight of core toner particles and colorant powder particles. Preferably, the weight fraction of colorant powder particles is from about 0.3 to about 3 times the product, (ρ/ρ) (d/r) (1+d/r), where ρis the density of the colorant powder particles, ρthe density of the core resin particles, d, the volumetric mean diameter of the colorant powder particles and r the volumetric mean radius of the toner core resin particles.