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:
Nov. 26, 1985
Filed:
Jun. 25, 1984
Applicant:
Inventors:
Shozo Kikugawa, Hino, JP;
Yoshitaka Yasufuku, Hino, JP;
Assignee:
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428336 ; 427128 ; 360134 ; 428337 ; 4284237 ; 4284259 ; 428447 ; 428323 ; 428408 ; 428694 ; 428695 ; 428900 ;
Abstract
A magnetic recording medium comprising a support having a magnetic layer on a first side of said support and a back coat layer on a second side of said support, which second side is opposite said first side, said back coat layer containing at least a silicon-modified polyurethane and a carbon black having a BET value of from 200 to 500 m.sup.2 /g, said silicon-modified polyurethane being obtained by the reaction of an isocyanate and an active hydrogen compound having a siloxane linkage.