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:
Mar. 29, 1988
Filed:
Jul. 02, 1986
Applicant:
Inventors:
Kiyokazu Oiyama, Miyagi, JP;
Yoshinobu Ninomiya, Miyagi, JP;
Hiroshi Yoshioka, Gunma, JP;
Ichiro Ono, Gunma, JP;
Assignees:
Sony Corporation, Tokyo, JP;
Shin-Etsu Chemical Co. Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
4284111 ; 427128 ; 428522 ; 428694 ; 428695 ; 428900 ;
Abstract
Described is a magnetic recording medium comprising a non-magnetic substrate and a magnetic layer formed thereon composed mainly of magnetic powder and a binder, said binder containing a compound represented by a following formula: ##STR1## wherein X represents tertiary amine sulfonate or tertiary amine sulfuric ester, Y represents a monomer having vinyl group which is copolymerizable with vinyl chloride and i, j, k represent polymerization degrees.