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:
May. 13, 2003
Filed:
Jan. 19, 2001
Applicant:
Inventors:
Gert Schlenkert, Düsseldorf, DE;
Horst Reckeweg, Heiligenhaus, DE;
Hartmut Wagner, Unterlüss, DE;
Assignee:
Rheinmetall W & M GmbH, Unterlüss, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D 5/18 ;
U.S. Cl.
CPC ...
C25D 5/18 ;
Abstract
A method of coating a metal surface, particularly an inner surface of a gun barrel, with a chromium layer, includes the following steps: electrolytically precipitating on the metal surface a plurality of partial chromium layers in a superposed relationship by electric current pulses equaling the number of the partial chromium layers; and selecting the duration of each pulse such that a crystallite growth of individual partial chromium layers is stopped prior to a natural termination thereof for obtaining a globular polytropic structure of the entire chromium layer.