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. 07, 1987
Filed:
Jul. 25, 1986
Applicant:
Inventor:
Weyman H Dunaway, Sandersville, GA (US);
Assignee:
E.C.C. America Inc., Atlanta, GA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106309 ; 1062 / ; 1063 / ; 1063 / ; 1063 / ;
Abstract
A method for improving brightness in a calcined kaolin pigment while minimizing detrimental effects on abrasiveness. The kaolin calciner feed is intermixed with a particulate material which is oxidizable during calcining to provide a source of auxiliary thermal energy in the kaolin bed; and the mixture is calcined at a temperature in the range of about 900.degree. C., but below about 1100.degree. C., and in the presence of an oxidizing atmosphere throughout the calcining step.