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:
Nov. 09, 2010
Filed:
Dec. 15, 2005
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:
Assistant Examiner:
Int. Cl.
CPC ...
D21H 17/55 (2006.01); D21H 21/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to resins useful for imparting strength to paper, the process of incorporating these resins into paper and the paper produced containing the resins. In particular the invention relates to resins useful for imparting dry-strength and wet-strength to paper under conditions of high sulfite ion concentrations.