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. 01, 2018
Filed:
Jun. 29, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Nobuyoshi Sugahara, Tokyo, JP;
Yuto Onozaki, Saitama, JP;
Hironori Minagawa, Moriya, JP;
Wakashi Iida, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A magnetic carrier according to the present invention includes a magnetic carrier core and a resin covering layer formed on a surface of the magnetic carrier core, wherein the resin covering layer contains a resin component and an inorganic fine particle, the inorganic fine particle contains an oxide of a typical metal element or a carbonate of a typical metal element, a moisture adsorption rate of the inorganic fine particle when allowed to stand in an environment of a temperature of 30° C. and a humidity of 80% for 72 hours is 25.0% by mass or less, an electrical conductivity of the inorganic fine particle is 2.0×10μS/m or more and 2.5×10μS/m or less, and a degree of crystallinity of the inorganic fine particle is 60% or less.