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. 21, 1983
Filed:
Jan. 20, 1982
Applicant:
Inventors:
Akihiko Hosaka, Tokyo, JP;
Kiyotaka Okuyama, Tokyo, JP;
Assignee:
TDK Electronics Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
4284259 ; 252 6253 ; 252 6254 ; 427127 ; 427128 ; 428694 ; 428695 ; 428900 ;
Abstract
In a magnetic recording medium having a substrate coated with a magnetic layer comprising a magnetic powder and a binder, an improvement characterized in that said binder in said magnetic layer essentially consisting of 20 to 60 wt. % of a polyurethane, 15 to 45 wt. % of a polyester resin and 20 to 50 wt. % of a vinyl chloride-vinyl acetate copolymer-impregnated nitrocellulose.
Hosaka, Akihiko. (1983). Magnetic recording medium (U.S. Patent No. 4389458). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4389458
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile