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:
Jan. 25, 2005
Filed:
May. 29, 2002
Applicants:
Pavol Kmec, Hamburg, NJ (US);
Dwight E. Emerich, Lincoln Park, NJ (US);
Inventors:
Pavol Kmec, Hamburg, NJ (US);
Dwight E. Emerich, Lincoln Park, NJ (US);
Assignee:
Ashland Inc., Dublin, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F 11167 ;
U.S. Cl.
CPC ...
Abstract
This invention relates to a composition and a method for inhibiting the formation of scale, particularly complex scale, in an aqueous system where more than one type of scale is present. The scale typically present in the aqueous system includes silica, silicates, and carbonates. The scale inhibiting composition comprises (1) 2-phosphonobutane-1,2,4-tricarboxylic acid and salts thereof, and (2) a copolymer of (1) one or more allyloxybenzenesulfonate monomers, and (2) one or more water-soluble acrylic monomers, substituted acrylic monomers, or mixtures thereof.