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:
Jul. 08, 2008
Filed:
Dec. 04, 2003
Applicants:
Martha Hollomon, Newark, DE (US);
Brian L. Walchuk, Hockessin, DE (US);
Frank J. Sutman, Jacksonville, FL (US);
Inventors:
Martha Hollomon, Newark, DE (US);
Brian L. Walchuk, Hockessin, DE (US);
Frank J. Sutman, Jacksonville, FL (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/32 (2006.01); C08F 220/56 (2006.01); C08F 222/00 (2006.01); C08F 220/06 (2006.01); C08F 293/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A papermaking method and a composition which utilize, as a drainage aid, a water-soluble cationic or amphoteric copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k') determined in 0.01M NaCl greater than 0.3 and a storage modulus (G′) at 6.3 Hz greater than 50 Pa.