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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.:

US 5116746 B1

PDFFull Text
Date of Patent:
May. 26, 1992

Filed:

Sep. 23, 1991

Cellulase-free endo-xylanase enzyme of use in pulp delignification

Applicant:
Inventors:

Roger L Bernier, Mississauga, CA;

Dieter Kluepfel, Montreal, CA;

Rolf Morosoli, Ville St-Laurent, CA;

Francois Shareck, Dollard-des-Ormeaux, CA;

Assignee:

Institut Armand Frappier, Quebec, CA;

Attorney:

Cushman, Darby & Cushman

Primary Examiner:

Richard C Peet

Int. Cl.
CPC ...
D21C / ; C12N / ; C12N / ; C12N / ;
U.S. Cl.
CPC ...
4351723 ; 435 691 ; 435 711 ; 435 91 ; 435169 ; 4351721 ; 435200 ; 4352523 ; 43525235 ; 4353201 ; 435886 ; 536 27 ; 162-1 ; 935-6 ; 935-9 ; 935 14 ; 935 22 ; 935 59 ; 935 60 ; 935 64 ; 935 72 ;
Abstract

A method of treating lignocellulosic material with a cellulase-free endo-xylanase for delignification, brightening and viscosity improvement. The endo-xylanase is obtained by the overexpression of the xylanase gene using a cellulase-negative recombinant microorganism of the genus Streptomyces. The recombinant microorganism is produced in a homologous cloning system in which the xylanase gene is inserted into a vector plasmid to provide the hybrid plasmid that is introduced into a host cellulase-negative mutant strain and said xylanase gene, said vector plasmid and said host mutant strain are obtained from microorganisms of the genus Streptomyces.

Find Patent Forward Citations

Bernier, Roger. (1992). Cellulase-free endo-xylanase enzyme of use in pulp delignification (U.S. Patent No. 5116746). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5116746

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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