The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2001
Filed:
Jan. 07, 2000
Applicant:
Inventors:
Assignee:
Powdertech Co., Ltd., Chiba-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/113 ;
U.S. Cl.
CPC ...
G03G 9/113 ;
Abstract
A carrier for an electrophotographic developer which is coated with an insulating resin containing a white conducting agent, wherein the white conducting agent includes spherical to lumpy particles of TiO,ZnO,or SnO,having two or more average particle sizes, the particles having thereon a 5 to 50 Å thick conducting layer of SnO,having a group V metal or phosphorus in solid solution therein.