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:
Mar. 16, 2004
Filed:
Sep. 18, 2001
Applicant:
Inventors:
Mengkui Luo, Tacoma, WA (US);
Vincent A. Roscelli, Edgewood, WA (US);
Amar N. Neogi, Seattle, WA (US);
Assignee:
Weyerhaeuser Company, Federal Way, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B 1/600 ; A01N 4/304 ; D21F 1/100 ; D21H 1/100 ;
U.S. Cl.
CPC ...
C08B 1/600 ; A01N 4/304 ; D21F 1/100 ; D21H 1/100 ;
Abstract
The present invention is directed to a pulp useful for making lyocell fibers. The pulp has a degree of polymerization from about 300 to about 1000; an alpha cellulose content of less than about 90% and in one instance can be made in a roll form. The degree of polymerization can be modified by acid hydrolysis, steam explosion; or alkaline enzymate degradation.