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:
Jan. 14, 2003
Filed:
Nov. 03, 1999
Applicant:
Inventors:
Brock Lundberg, St. Paul, MN (US);
Lin Gu, St. Paul, MN (US);
Rongsheng Roger Ruan, Arden Hills, MN (US);
Ling Chen, Roseville, MN (US);
Paul Bradley Addis, St. Paul, MN (US);
Jack Edgar Johnson, Waseca, MN (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A23L 1/05 ; D21C 3/02 ;
U.S. Cl.
CPC ...
A23L 1/05 ; D21C 3/02 ;
Abstract
An improved method for refining cellulose that produces a highly refined cellulosic material comprising soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. Also, a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g H O/g dry HRC is provided.