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:
Jan. 11, 1977
Filed:
Oct. 10, 1975
Applicant:
Inventors:
Kenton J Brown, Suffern, NY (US);
Arthur W Kempf, Warwick, NY (US);
Assignee:
International Paper Company, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 57 ; 8111 ; 162 65 ; 162 72 ; 162 90 ;
Abstract
An process for increasing the yields of wood pulp and improving the viscosity of the pulp during oxygen-alkali delignification is provided whereby, in a wood pulp at a consistency of about 1-10%, there are present, in the pulp to be delignified, small amounts of ammonia or a compound which releases ammonia under the alkaline conditions of the process.