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. 10, 1991
Filed:
Dec. 22, 1988
Applicant:
Inventors:
Weyman Dunaway, Sandersville, GA (US);
Ralph E Turner, Tennille, GA (US);
Assignee:
ECC America Inc., Atlanta, GA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C09C / ;
U.S. Cl.
CPC ...
106439 ; 501145 ; 501147 ; 106446 ; 106442 ;
Abstract
A method of producing a high opacity paper filler pigment which comprises subjecting an iron-stained titania-containing kaolin to beneficiation by froth flotation or high intensity magnetic separation; recovering the froth or magnet rejects, dewatering and drying the rejects to produce a kaolin enriched in titania, and calcining the same at a temperature in the range of about 1500.degree. to about 2200.degree. F.