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:
Jun. 23, 1992
Filed:
Nov. 01, 1990
Applicant:
Inventors:
Loc Quach, Columbia, MD (US);
Lai-Duien G Fan, Palatine, IL (US);
Assignee:
W. R. Grace & Co.-Conn., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210699 ; 210700 ; 210701 ;
Abstract
This invention relates to a method of inhibiting scale formation in aqueous systems wherein allylphosphonate copolymers are added to the system in an amount effective to inhibit scale formation. The allylphosphonate copolymers of this invention exhibit characteristic properties for the treatment of aqueous systems, namely strong calcium complexation, excellent iron dispersion, inhibition of calcium carbonate scale and inhibition of calcium phosphate deposition.