Patent · US Expired

Preparation of a magnetic dispersion

US4619777A · kind A · utility

5Cited by

3References

8Claims

0Family size

Assignee

BASF SE

Inventors

Milena Melzer · Ludwigshafen, DE
Helmut Jakusch · Bischofswerda, DE
Werner Grau · Frankenthal (Pfalz), DE
Eberhard Koster · Bischofswerda, DE
Werner Loser · Ludwigshafen, DE
Reinhard Polke · Mutterstadt, DE
Gunter Schadel · Mannheim, DE
Manfred Ohlinger · Bischofswerda, DE
Gunter Vath · Schifferstadt, DE

Key dates

Filing date	May 5, 1983
Grant date	Oct 28, 1986
Priority date	—
Expiry date	May 5, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/257
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A magnetic dispersion which can be applied to a non-magnetic base to produce a recording medium is prepared by dispersing a magnetically anisotropic material in a polymer binder and in an organic solvent by a method wherein the magnetically anisotropic material is worked in a jet mill before and/or during dispersing.

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