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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.:

US 4748081 B1

PDFFull Text
Date of Patent:
May. 31, 1988

Filed:

Feb. 21, 1986

Magnetic recording medium having an improved magnetic layer using

Applicant:
Inventors:

Osamu Kobayashi, Mito, JP;

Yukio Matsumoto, Mito, JP;

Hitoshi Takita, Mito, JP;

Mutsumu Kurihara, Mito, JP;

Tsunehide Naruse, Mito, JP;

Assignee:

Victor Company of Japan, Ltd., , JP;

Attorney:

Lowe, Price, LeBlanc, Becker & Shur

Primary Examiner:

Paul J Thibodeau

Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428329 ; 427128 ; 428694 ; 428900 ;
Abstract

A magnetic recording medium of the type comprising a non-magnetic substrate and a magnetic recording layer formed on at least one side of the substrate. The magnetic recording layer comprises particulate alpha-Fe.sub.2 O.sub.3 and carbon black as additives dispersed in a resin binder along with a magnetic powder. These additives serve to improve magnetic characteristics and a ilght-shielding property. When vinyl chloride-vinyl alcohol copolymers are used as the binder, further improvements are achieved.

Find Patent Forward Citations

Kobayashi, Osamu. (1988). Magnetic recording medium having an improved magnetic layer using (U.S. Patent No. 4748081). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4748081

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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