Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2005-02-23
2008-09-09
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...
C430S108210, C430S112000, C430S114000
Reexamination Certificate
active
07422834
ABSTRACT:
An electrostatic latent image developing magenta toner includes at least quinacridone pigment, naphthol pigment, and a release agent. Colorant of the toner satisfies conditions (a) and (b): (a) an average primary particle size D50 of a quinacridone pigment represented by formula (1) and an average primary particle size D50 of a naphthol pigment represented by formula (2) are such that the average primary particle size D50 of the quinacridone pigment is smaller than the average primary particle size D50 of the naphthol pigment; and (b) the average primary particle size D50 of the quinacridone pigment is greater than 20 nm, and the average primary particle size D50 of the naphthol pigment is smaller than 200 nm. Formula (1):Here, each of R1, R2, R3, and R4is selected from the group consisting of H, CH3, and Cl, R1and R2are different from each other, and R3and R4are different from each other. Formula (2):
REFERENCES:
patent: 2003/0194628 (2003-10-01), Yoshida et al.
patent: 42-23910 (1942-11-01), None
patent: A 63-282749 (1988-11-01), None
patent: A 1-154161 (1989-06-01), None
patent: A 1-225967 (1989-09-01), None
patent: A 2-32365 (1990-02-01), None
patent: B2 2-37586 (1990-08-01), None
patent: A 2-235069 (1990-09-01), None
patent: A 4-226477 (1992-08-01), None
patent: A 5-19536 (1993-01-01), None
patent: A 5-142867 (1993-06-01), None
patent: A 6-250439 (1994-09-01), None
patent: A 11-272014 (1999-10-01), None
patent: A 2000-199982 (2000-07-01), None
patent: A 2001-166541 (2001-06-01), None
patent: A 2001-249498 (2001-09-01), None
patent: A 2002-156795 (2002-05-01), None
patent: A 2003-215847 (2003-07-01), None
Machine translation of JP 05-142867.
Akiyama Hitomi
Hara Takashi
Ishiyama Takao
Isshiki Yuji
Kawakami Eiji
Chapman Mark A
Fuji 'Xerox Co., Ltd.
Oliff & Berridg,e PLC
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