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. 01, 2017
Filed:
Jun. 29, 2016
Fujifilm Corporation, Tokyo, JP;
Toshio Tada, Minami-ashigara, JP;
Akinori Sugishima, Minami-ashigara, JP;
Tatsuya Yamashita, Minami-ashigara, JP;
Norihito Kasada, Minami-ashigara, JP;
Masahito Oyanagi, Minami-ashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
The magnetic recording medium has a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, and the ferromagnetic hexagonal ferrite powder has a crystallite volume as determined by X-ray diffraction analysis ranges from 1,000 nmto 2,400 nm, and a ratio of the crystallite size Dobtained from a diffraction peak of a (107) plane to a particle size in a direction of an easy axis of magnetization Das determined by observation with a transmission electron microscope, D/D, is greater than or equal to 1.1.