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. 30, 1993
Filed:
Dec. 11, 1991
Applicant:
Inventors:
Uwe Keppeler, Ludwigshafen, DE;
Hermann Dikow, Hockenheim, DE;
Helmut Auweter, Limburgerhof, DE;
Michael Bobrich, Boehl-Iggelheim, DE;
Jochen Rudolph, Dossenheim, DE;
Gregor Brodt, Heppenheim, DE;
Albert Kohl, Laumersheim, DE;
Werner Lenz, Bad Durkheim, DE;
Rudolf Suettinger, Heidelberg, DE;
Assignee:
BASF Magnetic GmbH, Mannheim, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; G11B / ;
U.S. Cl.
CPC ...
4284259 ; 252 6254 ; 428694 ; 428900 ;
Abstract
Magnetic recording media consist of a nonmagnetic substrate and one or more magnetizable layers bonded thereon and based on a polyurethane binder, the binder consisting of not less than 50% by weight of a branched polyurethane elastomer having sulfonate groups and possessing urea groups at the chain ends.