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. 17, 1981
Filed:
Feb. 07, 1979
Applicant:
Inventors:
Tunehide Naruse, Yokohama, JP;
Ikuo Matsumoto, Yokohama, JP;
Assignee:
Victor Company of Japan, Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08K / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
525-6 ; 252 6254 ; 427127 ; 427128 ; 427129 ; 427131 ; 427132 ; 525123 ; 525125 ; 525129 ;
Abstract
A binder composition for magnetic recording tape which comprises polyisocyanate and a vinyl chloride-vinyl acetate copolymer non-reactive with the polyisocyanate, the copolymer being used in larger proportion. A resin or elastomer which is not reactive with the polyisocyanate may be added as a third component to impart flexibility or other desirable properties to the magnetic layer of tape.