Patent · US Expired

Acicular, ferromagnetic metal particles essentially consisting of iron, and their preparation

US4960462A · kind A · utility

2Cited by

2References

1Claims

0Family size

Assignee

BASF SE

Inventors

Michael Mueller · Dresden, DE
Kalus-Dieter Hoppe · Monsheim, DE
Ekkehard Schwab · Neustadt, DE
Werner Steck · Ludwigshafen, DE
Helmut Auweter · Schifferstadt, DE
Rainer Feser · Havelsee, DE

Key dates

Filing date	Dec 14, 1988
Grant date	Oct 2, 1990
Priority date	—
Expiry date	Dec 14, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F9/22
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Acicular, ferromagnetic metal particles which essentially consist of iron and have a nickel content of not more than 0.4% by weight and high values for coercive force and magnetization, and a process for the preparation of these particles. The particles further include zinc, phosphorus in the form of phosphate ions, and silicon in the form of SiO.sub.2.

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