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. 13, 1983
Filed:
Sep. 17, 1981
Applicant:
Inventor:
Fuminori Tokuda, Saku, JP;
Assignee:
TDK Electronics Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428329 ; 252 6254 ; 360134 ; 360135 ; 360136 ; 427128 ; 428323 ; 428328 ; 428694 ; 428900 ; 428480 ;
Abstract
A magnetic recording medium is composed of a base and a magnetic coating which comprises a binder and a magnetic powder dispersed therein. The magnetic powder, in turn, contains a nonmagnetic powder having an average particle size of not more than 2 .mu.m and a hardness of at least 6 on Mohs scale, in an amount of 1-20% on the basis of the weight of the magnetic powder, and the binder contains a resin such as polyester resin having a group expressed by the formula --SO.sub.3 M where M is monovalent metal such as Na.
Quick Actions:
Tokuda, Fuminori. (1983). Magnetic recording medium (U.S. Patent No. 4420531). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4420531
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile