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:
Sep. 16, 1980
Filed:
Feb. 05, 1979
Applicant:
Inventors:
Greta K Fossum, Domsjo, SE;
Sten L Haggstrom, Overhornas, SE;
Assignee:
Mo och Domsjo Aktiebolag, Ornskoldsvik, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 76 ; 162 78 ; 162 80 ; 162 89 ;
Abstract
A process is provided for the acid bleaching of cellulose pulp with peroxides at a pH within the range from about -0.5 to about 3, followed immediately by aqueous alkaline extraction of the dissolvable lignin without intermediate washing.
Fossum, Greta. (1980). Process for the acid bleaching of cellulose pulp with peroxides (U.S. Patent No. 4222819). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4222819
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile