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:
Mar. 25, 2025
Filed:
Mar. 28, 2023
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Assignee:
SEIKO EPSON CORPORATION, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/153 (2006.01); B22F 1/052 (2022.01); B22F 1/07 (2022.01); B22F 1/08 (2022.01); B22F 1/145 (2022.01); B22F 9/08 (2006.01);
U.S. Cl.
CPC ...
H01F 1/15383 (2013.01); B22F 1/052 (2022.01); B22F 1/07 (2022.01); B22F 1/08 (2022.01); B22F 1/147 (2022.01); B22F 2009/0804 (2013.01); B22F 2301/35 (2013.01);
Abstract
A magnetic bead contains: a magnetic metal powder; and a coating layer with which a particle surface of the magnetic metal powder is coated. When the magnetic bead is left to stand in a state of a dispersion obtained by dispersing the magnetic bead in water, a time until an initial absorbance of the dispersion attenuates to 80% of an absorbance when the standing is started is 90 seconds or longer.