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. 08, 2020
Filed:
Feb. 27, 2017
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventors:
Masahito Oyanagi, Minami-ashigara, JP;
Norihito Kasada, Minami-ashigara, JP;
Takuto Kurokawa, Minami-ashigara, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/66 (2006.01); G11B 5/708 (2006.01); G11B 5/702 (2006.01); G11B 5/71 (2006.01); G11B 5/73 (2006.01); G11B 5/733 (2006.01); G11B 5/735 (2006.01); G11B 5/78 (2006.01);
U.S. Cl.
CPC ...
G11B 5/7085 (2013.01); G11B 5/702 (2013.01); G11B 5/71 (2013.01); G11B 5/733 (2013.01); G11B 5/7305 (2013.01); G11B 5/735 (2013.01); G11B 5/78 (2013.01);
Abstract
The magnetic tape has a magnetic layer containing ferromagnetic powder, abrasive, and binder on a nonmagnetic support, wherein the centerline average surface roughness Ra measured on the surface of the magnetic layer is less than or equal to 1.8 nm, the contact angle for 1-bromonaphthalene that is measured on the surface of the magnetic layer falls within a range of 45.0° to 60.0°, and the coefficient of friction that is measured on the base portion of the surface of the magnetic layer is less than or equal to 0.35.