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:
Jan. 21, 2025
Filed:
Feb. 13, 2020
Powdertech Co., Ltd., Kashiwa, JP;
Aya Sakuta, Chiba, JP;
Makoto Ishikawa, Chiba, JP;
Hiroki Sawamoto, Chiba, JP;
Tetsuya Uemura, Chiba, JP;
POWDERTECH CO., LTD., Kashiwa, JP;
Abstract
The present invention relates to a carrier including: a magnetic core material; and a resin coating layer coating a surface of the magnetic core material, in which the resin coating layer contains a binder resin, and fluorine element-containing resin particles dispersed in the binder resin, the resin coating layer has a coefficient of variation of a film thickness of 25% or less, and the resin coating layer has an average value of the number of the fluorine element-containing resin particles being 3 particles/μmor more and 350 particles/μmor less per unit area in a cross section of the resin coating layer, and has a coefficient of variation thereof being 20% or less.