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, 2014
Filed:
Nov. 08, 2010
Applicants:
Shane Cyr, Landenberg, PA (US);
Henk Bakker, Barneveld, NL;
Willem Marinus Stevels, Harderwijk, NL;
Ronald Richard Staib, Hockessin, DE (US);
Inventors:
Shane Cyr, Landenberg, PA (US);
Henk Bakker, Barneveld, NL;
Willem Marinus Stevels, Harderwijk, NL;
Ronald Richard Staib, Hockessin, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/46 (2006.01); D21H 17/55 (2006.01); D21H 21/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to resins useful for drainage in papermaking and the process of making paper using the resins. In particular the invention relates to glyoxalated copolymers of acrylamide containing significant amounts of cationic comonomer.