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. 12, 1991
Filed:
Oct. 04, 1988
Applicant:
Inventor:
Juhani Luntamo, Pori, FI;
Assignee:
Sunds Defibrator Rauma Oy, Pori, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ; D21D / ;
U.S. Cl.
CPC ...
162 40 ; 162 55 ; 162 89 ;
Abstract
A method for the screening of defibred pulp bleached in several steps. In the method, the pulp coming from an acidic bleaching step (2) is screened (3, 4, 5, 6) at the same time as it is treated with an alkali. In this way, no separate alkali stage is needed.
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Luntamo, Juhani. (1991). Method for screening of defibered chlorine dioxide bleached pulp during (U.S. Patent No. 4999085). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4999085
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