The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1983
Filed:
May. 28, 1981
Applicant:
Inventors:
Hansjoerg Siegle, Ludwigshafen, DE;
Hans H Reich, Ludwigshafen, DE;
Horst Autzen, Freinsheim, DE;
Werner Steck, Mutterstadt, DE;
Werner Loeser, Ludwigshafen, DE;
Eckhard Hetzel, Bobenheim-Roxheim, DE;
Manfred Ohlinger, Frankenthal, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 / ; 75 26 ; 148105 ; 266172 ; 422143 ;
Abstract
A process for the preparation of acicular ferromagnetic metal particles, consisting essentially of iron, by reducing acicular iron oxides and/or iron oxide hydroxides, which are either pure or are modified with conventional foreign metal ions, by means of a gaseous reducing agent in a fluidized bed furnace in which a stirrer is provided immediately above the fluidizing grid.