Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Reexamination Certificate
2005-06-27
2008-10-28
Chapman, Mark A (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
C430S059200, C430S060000, C430S064000, C430S066000, C430S067000, C399S159000
Reexamination Certificate
active
07442479
ABSTRACT:
A photoreceptor including at least an electroconductive substrate, and a charge blocking layer, a moiré preventing layer, and a photosensitive layer, which are located overlying the electroconductive substrate in this order, wherein the photosensitive layer includes an azo pigment having a fluorenone skeleton. The photosensitive layer is preferably prepared by coating a coating liquid including a dispersion which is prepared by dispersing the azo pigment in a solvent to an extent such that the average particle diameter of the azo pigment is not greater than 0.3 μm and the standard deviation of the particle diameter is not greater than 0.2 μm, followed by filtering with a filter having an effective pore diameter not greater than 5 μm. An image forming apparatus and a process cartridge including the photoreceptor.
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Chapman Mark A
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh Company Limited
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