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. 22, 1998
Filed:
Jun. 05, 1997
Applicant:
Inventors:
Lee Ann Arrington-Webb, Sandersville, GA (US);
Chris B Maxwell, Evans, GA (US);
Prakash B Malla, Dublin, GA (US);
Amy C Semratedu, Sandersville, GA (US);
Assignee:
Thiele Kaolin Company, Sandersville, GA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03B / ; B03D / ; C09C / ;
U.S. Cl.
CPC ...
209166 ; 209 121 ; 209 39 ; 209 17 ; 209 10 ; 501148 ; 501149 ; 106486 ;
Abstract
Fine-grained kaolin clays having improved brightness can be produced by (a) using centrifugation to fractionate the clay starting material into finer and coarser fractions, (b) subjecting the coarser fraction to flotation to remove discoloring impurities and (c) combining the finer and floated coarser fractions to produce fine-grained kaolin clays having improved brightness.