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:
Mar. 03, 1992
Filed:
Mar. 04, 1991
Applicant:
Inventors:
Bhupati R Bhattacharyya, deceased, late of Downers Grove, IL (US);
John W Sparapany, Bolingbrook, IL (US);
Yvonne O Dunn, Naperville, IL (US);
Foster Michael H, Geneva, IL (US);
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08J / ; C08K / ; C08L / ;
U.S. Cl.
CPC ...
524801 ; 524535 ; 524555 ; 524728 ; 524804 ; 526 82 ; 5262922 ; 5263073 ; 5263075 ;
Abstract
Water-in-oil emulsion polymers of cationic acrylamides to which are added small quantities of a hydroxyalkyl methacrylate and sodium formate. These polymers are useful as flocculants in sludge dewatering processes.