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:
Aug. 06, 2019
Filed:
Mar. 31, 2017
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventors:
Yoichi Hosoya, Minami-ashigara, JP;
Masashi Shirata, Minami-ashigara, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/70 (2006.01); G11B 5/706 (2006.01); G11B 5/714 (2006.01); G11B 5/78 (2006.01); H01F 1/11 (2006.01); B82Y 25/00 (2011.01); H01F 1/00 (2006.01);
U.S. Cl.
CPC ...
G11B 5/70615 (2013.01); G11B 5/70678 (2013.01); G11B 5/714 (2013.01); G11B 5/78 (2013.01); H01F 1/11 (2013.01); B82Y 25/00 (2013.01); H01F 1/0063 (2013.01);
Abstract
Hexagonal ferrite powder has an average particle size falling within a range of 10 nm to 50 nm, a switching field distribution SFDmeasured at a temperature of 23° C. that is less than or equal to 0.80, and a ratio of a switching field distribution SFDthat is measured at a temperature of −190° C. to the SFD(SFD/SFD) that is greater than 0.80.