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:
May. 25, 2004
Filed:
Jan. 30, 2003
Applicant:
Inventors:
Christer Eckerman, Jurku, FI;
Bjarne Holmbom, Jurku, FI;
Assignee:
Oy Separation Research AB, Turku, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B27K 7/00 ; B27L 1/100 ;
U.S. Cl.
CPC ...
B27K 7/00 ; B27L 1/100 ;
Abstract
A method for recovery of branch knot wood and/or normal wood from oversize chips in which the oversize chips are ground to splinter, which then is dried and mixed with water, and then the sedimented splinter containing high concentrations of extractive substances and having a high specific weight is recovered and extracted in order to recover valuable extractive substances, particularly lignans. The lighter splinter floating up to the water surface is recovered in order to recover normal wood material for the pulp production.