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. 05, 2017
Filed:
Jul. 14, 2014
Applicant:
Nalco Company, Naperville, IL (US);
Inventors:
Weiguo Cheng, Naperville, IL (US);
Katherine M Broadus, Aurora, IL (US);
Dorota Smoron, Hoffman Estates, IL (US);
Shawnee M Wilson, Downers Gove, IL (US);
Assignee:
ECOLAB USA INC., St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/37 (2006.01); D21H 17/67 (2006.01); D21H 17/69 (2006.01); D21H 17/42 (2006.01); D21H 17/00 (2006.01); D21H 17/68 (2006.01); D21H 21/18 (2006.01);
U.S. Cl.
CPC ...
D21H 17/74 (2013.01); D21H 17/375 (2013.01); D21H 17/67 (2013.01); D21H 17/675 (2013.01); D21H 17/68 (2013.01); D21H 17/69 (2013.01); D21H 21/18 (2013.01);
Abstract
A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of an anionic first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second anionic flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.