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. 29, 2012
Filed:
Aug. 05, 2009
Yar-ming Wang, Rochester Hills, MI (US);
Hong-hsiang Kuo, Troy, MI (US);
Matthew J. O'keefe, Rolla, MO (US);
Surender Maddela, Rolla, MO (US);
Thomas J. O'keefe, Rolla, MO (US);
Jane G. O'keefe, Legal Representative, Rolla, MO (US);
Yar-Ming Wang, Rochester Hills, MI (US);
Hong-Hsiang Kuo, Troy, MI (US);
Matthew J. O'Keefe, Rolla, MO (US);
Surender Maddela, Rolla, MO (US);
Thomas J. O'Keefe, Rolla, MO (US);
Jane G. O'Keefe, legal representative, Rolla, MO (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Curators of The University of Missouri, Columbia, MO (US);
Abstract
Mixed-metal automotive vehicle bodies-in-white comprising ferrous metal surfaces, zinc surfaces, aluminum alloy surfaces, and magnesium alloy surfaces are cleaned and immersed in an aqueous bath comprising an adhesion promoter and an aqueous electrocoat bath (the adhesion promoter may be in the electrocoat bath. The adhesion promoter, which may be a cerium salt, is selected to react with each metal in the body surfaces to form an oxide layer that provides corrosion resistance for the surface and adherence for the deposited polymeric paint coating. The body is cathodic in the electrocoat deposition.