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:
Apr. 12, 1977
Filed:
Jul. 14, 1975
Applicant:
Inventors:
Eberhard Koester, Frankenthal, DT;
Gerd Wunsch, Speyer, DT;
Paul Deigner, Weisenheim, DT;
Werner Stumpfi, Ludwigshafen, DT;
Hans Henning Schneehage, Mutterstadt, DT;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
75 / ; 148105 ; 106290 ; 106306 ; 106304 ; 252 6262 ;
Abstract
A process for the manufacture of acicular ferromagnetic metal pigments containing iron, having a reduced field strength distribution and a steeper residual magnetization curve, by applying an alkaline earth metal cation and an organic compound having at least one group capable of forming a chelate to appropriate acicular iron oxides and then reducing the treated oxides.