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. 23, 2007
Filed:
Aug. 06, 2003
Hong-hsiang Kuo, Troy, MI (US);
Yar-ming Wang, Troy, MI (US);
Joseph C. Simmer, Armada, MI (US);
Hsai-yin Lee, Troy, MI (US);
Hong-Hsiang Kuo, Troy, MI (US);
Yar-Ming Wang, Troy, MI (US);
Joseph C. Simmer, Armada, MI (US);
Hsai-Yin Lee, Troy, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The present invention uses a two-step anodizing process to produce a colored anodized coating on the surface of an aluminum part. In accordance with this invention, a thin hard anodized coating layer is first formed on the surface of the aluminum part and then growing a softer a clear anodized coating layer on the surface of the aluminum part underneath the hard coat layer. The soft coat is essentially colorless and suitable for color finishing. This invention drastically improves the wear resistance of the aluminum part while maintaining a desired amount of clarity for effective electrolytic coloring.