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:
Apr. 19, 2005
Filed:
Dec. 11, 2002
Kevin K. Meagher, Northville, MI (US);
Thomas J. Prescott, Troy, MI (US);
Timm L. Kelly, Birmingham, MI (US);
Kevin K. Meagher, Northville, MI (US);
Thomas J. Prescott, Troy, MI (US);
Timm L. Kelly, Birmingham, MI (US);
Henkel Corporation, Gulph Mills, PA (US);
Abstract
A chemically and thermally stable chromate free aqueous liquid treatment for metals, especially aluminum, that imparts corrosion resistance as good as that from conventional chromate containing treatments, contains water and a fluoroacid selected from the group consisting of HTiF, HZrF, HHfF, HSiF, HGeF, HSnF, HBF, and mixtures thereof; a water soluble organic carboxylic acid that contains at least two hydroxyl groups, exclusive of the hydroxyl groups that are part of any carboxyl groups, per carboxyl group in each acid molecule, the water soluble salts of such acids, and mixtures thereof; a source of phosphate ions; and an organic component selected from the group consisting of tannins and amino-phenolic polymers.