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. 08, 2011
Filed:
Dec. 14, 2009
Michael R. St. John, Chicago, IL (US);
Angela P. Zagala, Cary, NC (US);
Michael R. St. John, Chicago, IL (US);
Angela P. Zagala, Cary, NC (US);
Nalco Company, Naperville, IL (US);
Abstract
A composition for enhancing the dewatering of a paper sheet on a paper machine and a method for using the composition is disclosed. The composition comprising one or more aldehyde-functionalized polymers comprising amino or amido groups wherein at least about 15 mole percent of the amino or amido groups are functionalized by reacting with one or more aldehydes and wherein the aldehyde functionalized polymers have a molecular weight of at least about 100,000. The method comprising adding the composition to the paper machine at a dosage of about 0.05 lb/ton to about 15 lb/ton, based on dry fiber.