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:
Jul. 14, 2020
Filed:
May. 19, 2015
Applicant:
Georgia-pacific Consumer Products Lp, Atlanta, GA (US);
Inventors:
Jeffrey A. Lee, Neenah, WI (US);
Raymond Jeffrey Harwood, Leicestershire, GB;
Edward J. Smith, Leicestershire, GB;
Assignee:
GPCP IP Holdings LLC, Atlanta, GA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 9/10 (2006.01); D21C 9/16 (2006.01); D21C 1/00 (2006.01); D06L 1/12 (2006.01); D21H 11/12 (2006.01); D21C 5/02 (2006.01); D06L 4/18 (2017.01); D21H 11/14 (2006.01); D06L 4/13 (2017.01); D06L 4/12 (2017.01); D06L 4/10 (2017.01); D01C 1/00 (2006.01);
U.S. Cl.
CPC ...
D21C 9/10 (2013.01); D01C 1/00 (2013.01); D06L 1/12 (2013.01); D06L 4/10 (2017.01); D06L 4/12 (2017.01); D06L 4/13 (2017.01); D06L 4/18 (2017.01); D21C 5/02 (2013.01); D21C 9/1068 (2013.01); D21C 9/1084 (2013.01); D21C 9/163 (2013.01); D21H 11/12 (2013.01); D21H 11/14 (2013.01); Y02W 30/648 (2015.05); Y10T 442/60 (2015.04);
Abstract
The present invention is directed to a method for scouring and increasing the brightness of non-wood fibers. The method comprises forming a mixture of non-wood fibers, exposing the mixture to a scouring liquor and a scouring agent comprising oxygen gas to form a scouring mixture, and scouring the scouring mixture by radially circulating the scouring liquor throughout the scouring mixture to provide scoured fibers.