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:
Sep. 13, 1994
Filed:
May. 14, 1993
Applicant:
Inventors:
Hermann Roller, Ludwigshafen, DE;
Peter Engelhardt, Hessisch Oldendorf, DE;
Reinhold Baur, Ortenberg, DE;
Michael Bobrich, Boehl-Iggelheim, DE;
Werner Latzel, Oberkirch, DE;
Werner Lenz, Bad Durkheim, DE;
Rudolf Suettinger, Heidelberg, DE;
Assignee:
BASF Magnetics GmbH, Mannheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428331 ; 428340 ; 428404 ; 428407 ; 4284231 ; 4286 / ; 4286 / ; 428900 ;
Abstract
In flexible magnetic recording media consisting essentially of a web-like nonmagnetic substrate, the magnetic layer is applied to one main side of the web-like substrate and a backing coating formed on the opposite main side of the substrate from a polymeric binder and nonmagnetic fillers as well as supporting pigments, the backing coating contains a precipitated silica treated on the surface with a phosphate-containing polyurethane.