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:
Sep. 16, 2003
Filed:
Aug. 05, 2002
Applicant:
Inventors:
John A. Westland, Auburn, WA (US);
Richard A. Jewell, Bellevue, WA (US);
Amar N. Neogi, Seattle, WA (US);
Assignee:
Weyerhaeuser Company, Federal Way, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
C08L 1/02 ; A61F 1/315 ; A61F 1/320 ; D21H 1/304 ;
U.S. Cl.
CPC ...
C08L 1/02 ; A61F 1/315 ; A61F 1/320 ; D21H 1/304 ;
Abstract
Cellulosic fibers intrafiber crosslinked with a polymeric polycarboxylic acid crosslinking agent are disclosed. In one embodiment, the polymeric polycarboxylic acid is polyacrylic acid and, in another embodiment, the polycarboxylic acid is polymaleic acid. Methods for forming cellulosic fibers having stable intrafiber crosslinks and for forming crosslinked cellulosic fibers having low knot level are also disclosed.