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:
Mar. 17, 2020
Filed:
Aug. 24, 2018
Applicant:
Mississippi Lime Company, St. Louis, MO (US);
Inventors:
Sean Dingman, St. Louis, MO (US);
Kory Mueller, Ste. Genevieve, MO (US);
Assignee:
Mississippi Lime Company, St. Louis, MS (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C 1/02 (2006.01); C01F 11/18 (2006.01); C01D 13/00 (2006.01); B01J 8/00 (2006.01); B01J 20/04 (2006.01); B01J 20/30 (2006.01); C09C 1/04 (2006.01);
U.S. Cl.
CPC ...
C01F 11/185 (2013.01); C09C 1/04 (2013.01); C01P 2006/60 (2013.01);
Abstract
A chemical processing method to increase the brightness of a naturally sourced GCC. The process described herein employs a persulfate under certain heating and stirring conditions to effect a brightness change which can be on the order of about 8 points on the GE brightness scale and can move a GCC which is under a GE level of 80 to above a GE level of 80.