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:
Aug. 22, 2000
Filed:
Mar. 06, 1997
Applicant:
Inventor:
Lothar Zapf, Alzenau, DE;
Assignee:
Vacuumschmelze GmbH, Hanau, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427127 ; 427250 ; 4273831 ; 4273833 ; 427124 ;
Abstract
NdFeB magnets are very sensitive to corrosion and are provided, among other things, with a layer of aluminum in order to improve their resistance to corrosion. To improve the resistance of an aluminum-coated article, such as the NdFeB magnet, the magnet with the aluminum coating is subjected to a heat treatment at a temperature lower than the melting temperature of the aluminum, which heat treatment improves the resistance to corrosion when subjected to a humid atmosphere at an elevated temperature.