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. 07, 1989
Filed:
Sep. 19, 1988
Applicant:
Inventor:
John W Gowan, Jr, Washington, DC (US);
Assignee:
Westvaco Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
1621646 ; 1621682 ; 1621683 ; 162175 ; 162180 ;
Abstract
A process is disclosed for sizing cellulose fibers with rosin-base materials in the substantial absence of alum, which can be performed at a neutural pH. According to the process, a saponified fortified rosin is added to the cellulose fibers in the presence of a cationic starch and a cationic polymer of at least medium weight and medium charge.