Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Reexamination Certificate
2005-06-28
2008-10-28
Le, Hoa V (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
C430S111310, C430S111320
Reexamination Certificate
active
07442483
ABSTRACT:
A ferrite carrier for the electrophotographic developer containing 40 to 500 ppm of zirconium; a method for preparing a ferrite carrier for the electrophotographic developer, comprising the steps for weighing, mixing, and pulverizing ferrite raw materials, and for granulating, drying, and firing the obtained slurry; wherein a zirconium raw material is added so that the zirconium content after firing becomes 40 to 500 ppm; and an electrophotographic developer using the ferrite carrier.
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patent: 0 928 998 (1999-07-01), None
patent: 08-194338 (1996-07-01), None
Harayama Tadashi
Honjo Toshio
Kayamoto Kanao
Kobayashi Hiromichi
Shinmura Issei
Le Hoa V
Powdertech Co., Ltd.
Rothwell Figg Ernst & Manbeck P.C.
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