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. 28, 2004
Filed:
Jul. 18, 2002
Applicant:
Inventors:
Kostan B. Charkhutian, Westwood, NJ (US);
Bruce L. Libutti, Teaneck, NJ (US);
Frank L. M. De Cordt, Ranst, BE;
John S. Ruffini, Mount Arlington, NJ (US);
Assignee:
Ashland Inc., Dublin, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 5/12 ;
U.S. Cl.
CPC ...
C02F 5/12 ;
Abstract
This invention relates to a process for inhibiting scale and fouling on metal surfaces exposed to an aqueous system, particularly a circulating aqueous system. The process comprises adding glutamic acid N,N diacetic acid, or salts thereof, to the aqueous system. Glutamic acid N,N diacetic acid, or salts thereof, act as a chelating agent and is biodegradable. The process is particularly useful for inhibiting the formation of scale and fouling on metal surfaces of steam generating and cooling systems.