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. 14, 1977
Filed:
May. 28, 1976
Applicant:
Inventor:
Jonas Arne Lindahl, Domsjoverken, SW;
Assignee:
Mo och Domsjo, Ornskoldsvik, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21B / ; D21C / ;
U.S. Cl.
CPC ...
162 24 ; 8111 ; 162 26 ; 162 37 ; 162 40 ; 162 71 ; 162 78 ; 241 15 ; 241 28 ;
Abstract
A process for the preparation of a cellulose pulp by mechanically freeing wood fibers in a grinder to form a fibrous pulp and bleaching the fibrous pulp with a peroxide-containing bleaching agent, as the only bleaching agent, in a peroxide bleaching stage, the mechanical freeing of the fibers being carried out in the presence of a spent liquor from the peroxide bleaching stage have a pH of 7 to 9.