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:
Sep. 08, 1987
Filed:
Nov. 01, 1985
Applicant:
Inventor:
Brian Greaves, Runcorn, GB;
Assignee:
W. R. Grace & Co., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
422 15 ; 422 16 ; 252180 ; 25238922 ; 25238923 ;
Abstract
A method for inhibiting corrosion in an aqueous system, for example a cooling system, is disclosed which comprises adding to the system a phosphonate of the formula: ##STR1## where R.sub.1 represents hydrogen or an alkyl radical of 1 to 6 carbon atoms and R.sub.2 represents hydrogen, hydroxyl or amino, or a salt thereof and a cationic polymer.