Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2007-03-06
2007-03-06
Chapman, Mark A. (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S108100, C430S110200, C430S114000
Reexamination Certificate
active
10841876
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.
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Commonly assigned U.S. Appl. No. 10/841,040, filed May 7, 2004, entitled “Positively Charged Coated Electrographic Toner Particles and Process”.
Commonly assigned U.S. Appl. No. 10/841,753, filed May 7, 2004, entitled “Negatively Charged Coated Electrographic Toner Particles and Process”.
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European Search Report for EP 05252781 issued on Sep. 20, 2005.
Moudry Ronald J.
Tokarski Zbigniew
Chapman Mark A.
Kagan Binder PLLC
Samsung Electronics Company
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