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. 23, 1990
Filed:
Feb. 26, 1988
Applicant:
Inventors:
August Lehner, Roedersheim-Gronau, DE;
Albert Kohl, Laumersheim, DE;
Michael Bobrich, Boehl-Iggelheim, DE;
Hermann Roller, Ludwigshafen, DE;
Peter Richter, Frankenthal, DE;
Werner Lenz, Bad Durkheim, DE;
Ludwig Kreitner, Heppenheim, DE;
Peter Rudolf, Maxdorf, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
4284259 ; 428694 ; 428900 ;
Abstract
In magnetic recording media consisting of a nonmagnetic base and, firmly applied to this, one or more magnetic layers based on a magnetic material finely dispersed in organic binders, the binder consists of not less than 50% by weight of a high molecular weight branched polyurethane elastomer possessing OH-containing urea groups at the chain ends.