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:
Jun. 02, 2015
Filed:
Mar. 30, 2010
Applicants:
Yohei Aritoshi, Kanagawa, JP;
Kazufumi Omura, Kanagawa, JP;
Inventors:
Yohei Aritoshi, Kanagawa, JP;
Kazufumi Omura, Kanagawa, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/71 (2006.01); G11B 5/702 (2006.01); G11B 5/70 (2006.01); G11B 5/738 (2006.01);
U.S. Cl.
CPC ...
G11B 5/7021 (2013.01); G11B 5/7013 (2013.01); G11B 5/738 (2013.01);
Abstract
An aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the magnetic layer and/or nonmagnetic layer comprises organic acid A and organic acid B below, with an acid strength pKa(A) of organic acid A and an acid strength pKa(B) of organic acid B satisfying a relation of pKa(A)<pKa(B);