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:
Jun. 19, 2001
Filed:
May. 13, 1999
Applicant:
Inventors:
Paul Kenneth Cutts, West Yorkshire, GB;
Matthew James Green, Kent, GB;
Bo Gunnar Drehmer, Sundsvall, SE;
Inger Viktoria Eriksson, Sundsvall, SE;
Hans Olov Johansson, Sundsvall, SE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 1/114 ; D21B 1/08 ;
U.S. Cl.
CPC ...
D21H 1/114 ; D21B 1/08 ;
Abstract
Cellulosic fines and cellulosic fibers are separated from a suspension containing the fines, the fibers and hydrophobic materials by screening the suspension to remove the fibers, and then subjecting the resultant filtrate to dispersed air flotation in the presence of calcium and generally a separation aid to form an upper Reject fraction in which the hydrophobic material is concentrated and a lower Accept fraction in which the cellulosic fines are concentrated.