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:
Apr. 29, 1997
Filed:
Mar. 01, 1996
Applicant:
Inventor:
Denis E Hassick, Monroeville, PA (US);
Assignee:
Calgon Corporation, Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210728 ; 210734 ; 210735 ;
Abstract
A method for reducing turbidity in laundry waste water comprising the steps of treating said water with effective amounts of a first polymer comprised of dimethyl dialkyl ammonium chloride (DMDAAC) and dialkyl diallyl ammonium monomers (DADAAX) other than DMDAAC having alkyl groups with from 8 to 18 carbon atoms and counterions with an ionization constant greater than 10.sup.-8, and a second cationic, nonionic or anionic acrylamide polymer is disclosed.