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:
Mar. 06, 2007
Filed:
May. 07, 2004
Ronald J. Moudry, Woodbury, MN (US);
Zbigniew Tokarski, Woodbury, MN (US);
Ronald J. Moudry, Woodbury, MN (US);
Zbigniew Tokarski, Woodbury, MN (US);
Samsung Electronics Company, Suwon, KR;
Abstract
Negatively charged coated toner particles are provided that comprise a plurality of polymeric binder particles that are substantially free of negatively charged pigment and a coating material comprising at least one negatively charged pigment coated on the outside surface of the polymeric binder particles. In one embodiment, a majority of the specific charge of the toner particles is contributed from the negatively charged pigment. In another embodiment, the toner particles are substantially free of additional charge director or charge control additive. Electrographic toner compositions comprising these particles are also provided.