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. 22, 2016
Filed:
Oct. 31, 2013
Donovan L. Erickson, Stanchfield, MN (US);
Roy A. Johnson, Oconomowoc, WI (US);
Matthew Ryan Labrosse, Maple Grove, MN (US);
Paul R. Young, Wheaton, IL (US);
Donovan L. Erickson, Stanchfield, MN (US);
Roy A. Johnson, Oconomowoc, WI (US);
Matthew Ryan LaBrosse, Maple Grove, MN (US);
Paul R. Young, Wheaton, IL (US);
U.S. Water Services Inc., St. Michael, MN (US);
Abstract
Methods for inhibiting the corrosion of metals in contact with an aqueous system are provided. The method of inhibiting corrosion includes maintaining effective amounts of (1) an amino acid-based polymer, such as a polyaspartic acid compound, and (2) a dispersible and/or soluble tin compound in the aqueous system. The corrosion inhibiting components of the treatment may be added simultaneously or separately into the water of the aqueous system, i.e., provided either in a single treatment product or as separate products. Such a corrosion inhibiting method may optionally also include adding a polycarboxylic acid chelating agent and/or a carboxylate/sulfonate functional copolymer to the aqueous system.