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:
Jun. 14, 1988
Filed:
May. 13, 1987
Applicant:
Inventors:
Mitsuhiro Katayama, Gunma, JP;
Kenkichi Hara, Gunma, JP;
Kazuyoshi Oka, Gunma, JP;
Ulf Engstrom, Hoganas, SE;
Svenn E Larssen, Nyhamnslage, SE;
Assignees:
Kanto Denka Kogyo Co., Ltd., Tokyo, JP;
Hoganas AB, Hoganas, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ; G03G / ;
U.S. Cl.
CPC ...
430137 ;
Abstract
A novel carrier material useful in conjunction with a toner for preparing a two-component developer for electrophotographic processes is provided. The carrier comprises a spherical magnetite particulate material having a reduced metallic iron outer layer which is coated with an outermost resinous layer for conditioning the copying properties of the carrier.