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:
Oct. 30, 2001
Applicant:
Inventors:
Mengkui Luo, Tacoma, WA (US);
Vincent A. Roscelli, Edgewood, WA (US);
Amar N. Neogi, Seattle, WA (US);
James E. Sealey, II, Federal Way, WA (US);
Richard A. Jewell, Bellevue, WA (US);
Assignee:
Weyerhaeuser Company, Federal Way, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
D01D 1/02 ; D01D 5/06 ; D01D 5/18 ; D01F 2/02 ;
U.S. Cl.
CPC ...
D01D 1/02 ; D01D 5/06 ; D01D 5/18 ; D01F 2/02 ;
Abstract
The present invention is directed to methods of making lyocell fibers. In particular, the process includes reducing the average degree of polymerization of a pulp to about 200 to 1100 without substantially reducing the hemicellulose content of the pulp, and reducing the copper number to less than 2.0.