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. 31, 1994
Filed:
Dec. 09, 1991
Applicant:
Inventor:
Herbert H Espy, Wilmington, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
1621643 ; 1621646 ; 1621682 ; 1621683 ; 162175 ; 162176 ; 162177 ; 162178 ; 162183 ;
Abstract
A method for imparting wet strength to paper with improved water absorbency, that comprises adding to an aqueous suspension of cellulosic paper stock a neutral or alkaline-curing thermosetting wet-strength resin, a water-soluble polymer containing carboxyl groups or carboxylate ions as their alkali metal or ammonium salts, and a substantially non-thermosetting tertiary-amino polyamide-epichlorohydrin resin.
Espy, Herbert. (1994). Absorbance and permanent wet-strength in tissue and toweling paper (U.S. Patent No. 5316623). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5316623
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile