Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Reexamination Certificate
2007-03-07
2010-12-07
Chapman, Mark A (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
Reexamination Certificate
active
07846636
ABSTRACT:
The present invention relates to a process for readily producing a toner for electrophotography which contains toner particles having a small particle size and a narrow particle size distribution, and a toner for electrophotography having a small particle size and a narrow particle size distribution which is produced by the above process. There is provided a process for producing a toner for electrophotography which includes the steps of (A) finely dispersing a resin binder in an aqueous medium in the presence of a nonionic surfactant to prepare a dispersion of resin binder-containing fine particles; (B) aggregating the resin binder-containing fine particles obtained in the step (A) together to prepare a dispersion of mother particles; (C) adding a dispersion of a resin binder-containing fine particles at one time or sequentially in several divided parts to the dispersion of the mother particles obtained in the step (B) to prepare aggregated particles thereof; and (D) coalescing the aggregated particles obtained in the step (C), as well as a toner for electrophotography which is produced by the above process.
REFERENCES:
patent: 5849456 (1998-12-01), Matsumura et al.
patent: 7521166 (2009-04-01), Sata et al.
patent: 10-26842 (1998-01-01), None
patent: 2004-12650 (2004-01-01), None
Chapman Mark A
Kao Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
LandOfFree
Process for producing toner for electrophotography does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for producing toner for electrophotography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing toner for electrophotography will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4226397