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:
Nov. 09, 2004
Filed:
Dec. 30, 2002
Applicant:
Inventors:
Gary Woodward, Cheshire, GB;
Graham Philip Otter, Birmingham, GB;
Keith Philip Davis, Staffordshire, GB;
Robert Eric Talbot, Staffordshire, GB;
Assignee:
Rhodia Consumer Specialties Limited, Watford, GB;
Primary Examiner:
Int. Cl.
CPC ...
C02F 5/14 ; C23F 1/100 ; C07F 9/38 ;
U.S. Cl.
CPC ...
C02F 5/14 ; C23F 1/100 ; C07F 9/38 ;
Abstract
A scale and corrosion inhibitor for use in the treatment of water comprises at least one oxyalkylene unit and at least one phosphonate unit (e.g. a unit derived prom a mono- or di-phosphonic acid such as VPA or VDPA). Inhibitors according to the present invention have been found to exhibit both scale-inhibiting and corrosion-inhibiting properties, especially in the treatment of cooling water and water used in oilfield applications.