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:
Nov. 11, 1986
Filed:
Oct. 01, 1984
Applicant:
Inventors:
Madhu P Godsay, Monroe, NY (US);
Michael N Hull, Bardonia, NY (US);
Vacheslav M Yasnovsky, Orangeburg, NY (US);
Assignee:
International Paper Company, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 65 ; 162 72 ; 162 77 ; 162 79 ; 162 96 ;
Abstract
The use of primary and secondary amines and certain other compounds in ferricyanide assisted oxygen delignifying bleaching of lignocellulosic pulps permits more rapid removal of a desired amount of lignin from the pulp and, hence, the retention of higher pulp viscosity.