Patent · US Expired

Magnetic recording media with a dual protective coating of silicon monoxide and chromium

US4560624A · kind A · utility

10Cited by

9References

3Claims

0Family size

Assignee

BASF SE

Inventors

Christine Guttner · Heidelberg, DE
Peter Heilmann · Bad Dürkheim, DE
Udo Kullmann · Dirmstein, DE
Dieter Mayer · Ludwigshafen, DE
Werner Grau · Frankenthal (Pfalz), DE

Key dates

Filing date	Nov 29, 1984
Grant date	Dec 24, 1985
Priority date	—
Expiry date	Nov 29, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12806
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Magnetic recording media possess, on a dimensionally stable base which may or may not be provided with a non-magnetic lower layer, a thin ferromagnetic metal layer on which a protective layer consisting of a silicon monoxide/chromium dual coating is applied.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.