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:
Jan. 31, 2012
Filed:
Apr. 25, 2007
Applicants:
Georg Werner Reppel, Hammersbach, DE;
Volker Zellmann, Linsengericht, DE;
Inventors:
Georg Werner Reppel, Hammersbach, DE;
Volker Zellmann, Linsengericht, DE;
Assignee:
Vacuumschmelze GmbH & Co., Hanau, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/047 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for the production of pressed permanent magnets comprises the following steps: A mixture of at least one magnetic powder and a thermosetting binder is provided and pressed to produce a moulded body. In order to obtain a permanent and particularly reliable protection against oxidation and corrosion, the moulded body is impregnated with an acid and solvent mixture in an impregnating bath before the cure of the thermosetting binder, whereby the entire surface of the permanent magnet is coated with a reaction layer [FIG.