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:
Sep. 20, 2016
Filed:
Mar. 29, 2012
Shigenori Harada, Hiroshima-ken, JP;
Shinji Uemoto, Hiroshima-ken, JP;
Hiromitsu Misawa, Hiroshima-ken, JP;
Eiichi Kurita, Hiroshima-ken, JP;
Koso Aoki, Hiroshima-ken, JP;
Shigenori Harada, Hiroshima-ken, JP;
Shinji Uemoto, Hiroshima-ken, JP;
Hiromitsu Misawa, Hiroshima-ken, JP;
Eiichi Kurita, Hiroshima-ken, JP;
Koso Aoki, Hiroshima-ken, JP;
TODA KOGYO CORPORATION, Hiroshima, JP;
Abstract
The present invention provides magnetic iron oxide particles having a high bonding property to a resin as well as a magnetic carrier for electrophotographic developers which is improved in durability by enhancing adhesion between a magnetic carrier core material and a coating resin. The magnetic iron oxide particles of the present invention are magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which a plurality of granules are bonded, and the magnetic carrier for electrophotographic developers according to the present invention is a magnetic carrier for electrophotographic developers which comprises spherical magnetic composite particles produced by dispersing magnetic iron oxide particles in a binder resin in which the magnetic iron oxide particles comprise at least the above magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which the plurality of granules are bonded.