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. 11, 2012
Filed:
Jun. 05, 2008
Applicants:
Pam O'leary, Queensbury, NY (US);
Namhee Shin, Clifton Park, NY (US);
C. Bertil Stromberg, Diamond Point, NY (US);
Inventors:
Pam O'Leary, Queensbury, NY (US);
Namhee Shin, Clifton Park, NY (US);
C. Bertil Stromberg, Diamond Point, NY (US);
Assignee:
Andritz Inc., Glens Falls, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 9/10 (2006.01); D21C 9/147 (2006.01); D21C 9/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
Process for bleaching of pulps following cooking of the lignocellulosic material with soda and anthraquinone. The process may produce a whiteness on par with the bleaching of kraft pulp when using a similar bleaching sequence. In some instances, the bleaching sequence may be O-A-Do-Eop-D, O-A-ZDo-Eop-D, A-Do, or A-ZDo.