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:
Jan. 02, 2001
Filed:
Mar. 25, 1999
Applicant:
Inventors:
Hideki Sasaki, Tokyo, JP;
Naoyuki Nagashima, Tokyo, JP;
Masatoshi Uchida, Tokyo, JP;
Shigeyo Miyamori, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/73 ;
U.S. Cl.
CPC ...
G11B 5/73 ;
Abstract
Disclosed is a magnetic recording medium excellent in surface properties, good in electromagnetic characteristics, and excellent in durability, which comprises a non-magnetic support and a magnetic layer formed thereon through a non-magnetic layer, in which the non-magnetic layer contains, as binders, a vinyl chloride resin having carboxylic acid and amine polar groups, and a polyurethane resin having phosphobetaine and/or phosphamine as a polar group.