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:
Apr. 02, 2019
Filed:
Sep. 06, 2017
Applicant:
Powdertech Co., Ltd., Chiba, JP;
Inventors:
Assignee:
POWDERTECH CO., LTD., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/113 (2006.01); G03G 9/107 (2006.01); G03G 9/10 (2006.01);
U.S. Cl.
CPC ...
G03G 9/1133 (2013.01); G03G 9/10 (2013.01); G03G 9/107 (2013.01); G03G 9/1075 (2013.01); G03G 9/1131 (2013.01); G03G 9/1132 (2013.01); G03G 9/1136 (2013.01);
Abstract
An object of the present invention is to provide a carrier low in specific gravity and less in both environmental fluctuation and change of the charge amount after aging, an electrophotographic developer using the carrier, and a method of manufacturing the carrier. To achieve the object, the carrier is manufactured by coating a core material composed of a magnetic component and a non-magnetic component with a resin, and the carrier is characterized in that water content is 200 ppm or less and cyclic siloxane content is 100 ppb or less. Further, an electrophotographic developer containing the carrier is provided.