Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2007-11-21
2010-12-28
Chapman, Mark A (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S108300, C430S108600, C430S137210
Reexamination Certificate
active
07858281
ABSTRACT:
A developer comprised of a toner and at least one external surface additive, wherein an acid-base interaction has an Interaction Surface Parameter (ISP) of greater than 0, and wherein ISPis defined by the following equation: [(Ka)toner×(Kb)additive]+[(Kb)toner×(Ka)additive]−[(Ka)toner×(Ka)additive]−[(Kb)toner×(Kb)additive], wherein Kais the Lewis acid value and Kbis the Lewis base value.
REFERENCES:
patent: 5556727 (1996-09-01), Ciccarelli et al.
patent: 2006/0269858 (2006-11-01), McDougall et al.
patent: 2008/0171279 (2008-07-01), Veregin et al.
U.S. Appl. No. 11/624,004, filed Jan. 17, 2007 by Veregin et al.
McDougall Maria N. V.
Veregin Richard P. N.
Chapman Mark A
Oliff & Berridg,e PLC
Xerox Corporation
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