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:
Apr. 20, 2004
Filed:
Apr. 08, 2002
Applicant:
Inventors:
Joseph Donald Van Handel, Plover, WI (US);
Constance K. Klaisner, Oshkosh, WI (US);
John C. Gast, Hockessin, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 2/120 ; D21H 1/729 ; D21H 1/756 ; D21H 2/304 ;
U.S. Cl.
CPC ...
D21H 2/120 ; D21H 1/729 ; D21H 1/756 ; D21H 2/304 ;
Abstract
Addition of a premixed aqueous mixture of anionic dry strength resin and cationic or amphoteric starch to a paper making pulp slurry yields paper with higher dry strength than paper that is the same except that the starch and dry strength resin are added separately.