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. 26, 2002
Filed:
Jun. 27, 2000
Applicant:
Inventors:
Bruce A. Keiser, Naperville, IL (US);
Maureen B. Nunn, Naperville, IL (US);
Cheng-Sung Huang, Naperville, IL (US);
Dennis L. MacDonald, Wheaton, IL (US);
Assignee:
Ondeo Nalco Company, Naperville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/3141 ; C01B 3/312 ; B01F 3/12 ;
U.S. Cl.
CPC ...
C01B 3/3141 ; C01B 3/312 ; B01F 3/12 ;
Abstract
A stable aquasol containing colloidal silica having a surface area of from about 700 m /g to about 1100 m /g, and an S-value of from about 20 to about 50; wherein the colloidal silica is not surface treated; wherein the molar ratio of SiO /Na O in the colloidal silica is greater than about 13.0:1 and is less than about 17.0:1; and wherein the aquasols have a percent by weight SiO solids level of from about 7.00 percent to about 16.80 percent is described and claimed.