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:
Jun. 08, 1993
Filed:
Mar. 19, 1992
August Lehner, Roedersheim-Gronau, DE;
Rudolf Suettinger, Heidelberg, DE;
Michael Bobrich, Boehl-Iggelheim, DE;
Hermann Dikow, Hockenheim, DE;
Hermann Roller, Ludwigshafen, DE;
Werner Lenz, Bad Durkheim, DE;
Ludwig Kreitner, Heppenheim, DE;
Werner Loch, Erpolzheim, DE;
Norbert Schneider, Altrip, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Magnetic recording media consisting of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon and is based on a magnetic material which essentially consists of ferromagnetic chromium dioxide and is finely dispersed in a polymer binder and further conventional additives are distinguished by a particular stability to the chemical decomposition due to moisture and oxidizable compounds and hence particular stability to the deterioration in the magnetic properties, as a result of the addition of from 0.1 to 8% by weight, based on the amount of chromium dioxide, of a monomeric, polyunsaturated, organic compound to the magnetic layer.