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:
May. 17, 1988
Filed:
Jun. 02, 1987
Applicant:
Inventors:
Gary L Deets, St. Peters, MO (US);
William G Tamalis, Maryland Heights, MO (US);
Assignee:
Akzo N.V., Arnhem, NL;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21D / ; D21D / ;
U.S. Cl.
CPC ...
1621646 ; 1621682 ;
Abstract
Cationic starch graft copolymers are disclosed which improve the dry strength of paper when used as wet-end additives. Such copolymers comprise cationic starch, nonionic vinyl monomers and cationic vinyl monomers which have been polymerized.