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:
Jan. 29, 1991
Filed:
Feb. 08, 1989
Applicant:
Inventors:
Walter T Murphy, Cuyahoga Falls, OH (US);
Hsiungto S Tseng, Westlake, OH (US);
Edmond G Kolycheck, Lorain, OH (US);
Assignee:
The B. F. Goodrich Company, Akron, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
4284259 ; 428900 ; 428694 ;
Abstract
A magnetic recording tape, as for audio apparatus, video apparatus, or computers, has a binder containing magnetic particles therein bonding the magnetic particles to the substrate. The binder comprises the reaction product of a polyisocyanate and a blend of a hydroxyl terminated polyester intermediate and a derivative of a bis-phenol A chain extender having the formula ##STR1## where R.sup.1 and R.sup.2, independently, is an alkylene having from 2 to 4 carbon atoms, with 2 carbon atoms, that is, ethylene, being preferred.