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:
Jul. 22, 2008
Filed:
Apr. 25, 2005
Applicants:
Craig W. Myers, Lisle, IL (US);
Steven R. Hatch, Naperville, IL (US);
Donald A. Johnson, Batavia, IL (US);
Inventors:
Craig W. Myers, Lisle, IL (US);
Steven R. Hatch, Naperville, IL (US);
Donald A. Johnson, Batavia, IL (US);
Assignee:
Nalco Company, Naperville, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B 1/00 (2006.01); C09K 3/00 (2006.01); C23F 11/00 (2006.01); C05C 9/00 (2006.01); C05B 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A trace amount of a tungstate is disclosed for inhibiting corrosion by nitrogen fertilizer solution, in particular, an ammonium nitrate fertilizer solution, (UAN) in contact with ferrous metal storage tanks, piping, and equipment surfaces. Tungstate added with a dispersant polymer is also effective for inhibiting corrosion.