Patent · US Expired

Preparation of acicular cobalt-containing ferrimagnetic iron oxides

US4755395A · kind A · utility

1Cited by

9References

3Claims

0Family size

Assignee

BASF SE

Inventors

Werner Steck · Ludwigshafen, DE
Rainer Feser · Havelsee, DE
Werner Loeser · Ludwigshafen, DE
Peter Rudolf · Ludwigshafen, DE
Guenter Vaeth · Schifferstadt, DE
Helmut Jakusch · Bischofswerda, DE
Jenoe Kovacs · Heßheim, DE

Key dates

Filing date	May 5, 1986
Grant date	Jul 5, 1988
Priority date	—
Expiry date	May 5, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/70673
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The preparation of acicular ferrimagnetic iron oxides which contain cobalt and phosphate ions and, if desired, further additives, and their use for manufacturing magnetic recording media.

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