Patent · US Expired

Disk-shaped magnetic recording media, their production and information stores containing these recording media

US5084319A · kind A · utility

8Cited by

12References

4Claims

0Family size

Assignee

BASF SE

Inventors

Hartmut Hibst · Schriesheim, DE
Arend Werner · Ludwigshafen, DE
Joachim Hack · Ludwigshafen, DE
Heinrich Mannsperger · Dossenheim, DE
Michael Hitzfeld · Karlsruhe, DE
Werner Grau · Frankenthal (Pfalz), DE
Guenter Heil
Norbert Holl · Germering, DE

Key dates

Filing date	Nov 14, 1989
Grant date	Jan 28, 1992
Priority date	—
Expiry date	Nov 14, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/30
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Disk-shaped magnetic recording media essentially consisting of a flexible substrate, a thin ferromagnetic metal film applied to one or both sides and a protective or antifriction layer present on this metal film and essentially consisting of carbon, a process for the production of these recording media and information stores containing these recording media.

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