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:
Jul. 08, 1997
Filed:
Jan. 30, 1995
Applicant:
Inventors:
James H Payton, Marietta, GA (US);
Nicholas M Canaris, Atlanta, GA (US);
Assignee:
Vinings Industries, Inc., Atlanta, GA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 76 ; 162 78 ; 162 90 ;
Abstract
Pulp bleaching processes employing peroxides and/or oxygen are improved by using bleaching additives, preferably before the application of the peroxide and/or oxygen. The bleaching additives contain at least one alkali metal sulfamate such as a sodium sulfamate and a polyaminocarboxylic acid such as DTPA or a salt thereof, such as sodium DTPA.