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:
Dec. 02, 1997
Filed:
Apr. 26, 1996
Applicant:
Inventors:
Stephen M Kessler, Fairless Hills, PA (US);
Roger C May, Glenside, PA (US);
Assignee:
BetzDearborn Inc., Trevose, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
422 15 ; 422 14 ; 25238922 ;
Abstract
A method and composition for controlling corrosion of metals in contact with an aqueous system is disclosed, which method includes introducing into the aqueous system a sufficient amount of a substantially zinc-free treatment comprising a phosphate compound, and glucoheptonic acid or a water soluble salt thereof.