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. 11, 1997
Filed:
Jun. 09, 1995
Applicant:
Inventors:
Marco Solinas, Vancouver, CA;
Allan M Proust, Surrey, CA;
Assignee:
MacMillan Bloedel Limited, Vancouver, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 65 ; 162 72 ; 162 77 ;
Abstract
An improved oxygen bleaching process wherein the pulp is bleached in an aqueous organic medium wherein a polyhydric alcohol constitutes between 10 and 70% by weight of the medium to produce a pulp having a viscosity at least 2.5 cp higher than a similar pulp bleached using the same conditions in an aqueous atmosphere to the same kappa no. of 8 ml.