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. 22, 1983
Filed:
Jan. 04, 1982
Applicant:
Inventors:
George R Killat, Midland, MI (US);
Larry R Wilson, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
1621643 ; 1671682 ; 1671684 ; 1671685 ; 1671686 ;
Abstract
Wet strength of paper is effectively increased by contacting paper pulp with an ammonium polyamidoamine having cross-linking functionality such as epoxy or azetidinium and subjecting a wet sheet of such pulp to conditions sufficient to cure the polyamidoamine.