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:
Mar. 18, 2014
Filed:
Aug. 03, 2007
Applicants:
Mark W. Mcmillen, Cabot, PA (US);
Edward F. Rakiewicz, Gibsonia, PA (US);
Inventors:
Mark W. McMillen, Cabot, PA (US);
Edward F. Rakiewicz, Gibsonia, PA (US);
Assignee:
PPG Industries Ohio, Inc, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C 22/48 (2006.01); C23C 22/06 (2006.01); C23C 22/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed are methods for treating metal substrates, including ferrous substrates, such as cold rolled steel and electrogalvanized steel. The methods include contacting the substrate with a pretreatment composition that includes: (a) a group IIIB and/or IVB metal; (b) free fluorine; (c) a metal fluoride salt formed from a metal which forms a fluoride salt having a pKof at least 11; and (d) water.