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:
Dec. 29, 2020
Filed:
Aug. 05, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Ryuichiro Matsuo, Moriya, JP;
Nobuyoshi Sugahara, Tokyo, JP;
Hironori Minagawa, Moriya, JP;
Wakashi Iida, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A magnetic carrier including a magnetic carrier particle having a magnetic carrier core and a resin coating layer formed on a surface of the magnetic carrier core, wherein the resin coating layer includes a resin component including a resin A and a resin B, the resin A is a copolymer of monomers including (a) a (meth)acrylic acid ester monomer having an alicyclic hydrocarbon group and (b) a specific macromonomer, the resin B is a copolymer of monomers including (c) a styrene-based monomer and (d) a specific (meth)acrylic acid ester monomer, and in a molecular weight distribution of a THF soluble component of the resin component contained in the resin coating layer, a peak derived from the resin B is present in a molecular weight range of from 1000 to 9500.