Invention Grant
- Patent Title: Magnetic carrier
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Application No.: US15196443Application Date: 2016-06-29
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Publication No.: US09958809B2Publication Date: 2018-05-01
- Inventor: Nobuyoshi Sugahara , Yuto Onozaki , Hironori Minagawa , Wakashi Iida
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick Cella Harper and Scinto
- Priority: JP2015-050474 20150313
- Main IPC: G03G15/09
- IPC: G03G15/09 ; G03G9/107 ; G03G9/113

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 2.0×10−9 μS/m or more and 2.5×10−5 μS/m or less, and a degree of crystallinity of the inorganic fine particle is 60% or less.
Public/Granted literature
- US20160306301A1 MAGNETIC CARRIER Public/Granted day:2016-10-20
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