Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2008-03-11
2011-10-04
Huff, Mark F (Department: 1721)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S108700, C430S118800, C430S137100
Reexamination Certificate
active
08029960
ABSTRACT:
A toner, including a parent particulate material including a colorant and a binder resin, and an external additive including particles having an average primary particle diameter from 80 to less than 150 nm in an amount of from 0.03 to 2% by number, particles having an average primary particle diameter from 5 nm to less than 15 nm in an amount of from 50 to 95% by number, and particles having an average primary particle diameter from 15 to less than 40 nm in an amount of from 5 to 40% by number, and the particles having an average primary particle diameter from 80 to less than 150 nm include particles having an average primary particle diameter not less than 200 nm in an amount of from 10 to 30% by number, and have a weight reduction rate not greater than 3.00% when heated from 30 to 250° C.
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U.S. Appl. No. 12/203,278, filed Sep. 3, 2008, Yamada et al.
Kojima Satoshi
Nagatomo Tsuneyasu
Uchinokura Osamu
Watanabe Naohiro
Huff Mark F
Jelsma Jonathan
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Ricoh Company Limited
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