Granted Patent
Utility
US 6,186,335 · App. 09/045,765
Process for beneficiating kaolin clays
Inventors:
Lee Ann Arrington-Webb, Robert A. Lowe, Chris B. Maxwell, Prakash B. Malla, Amy C. Semratedu, Cesar I. Basilio
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Mar 20, 1998
Inventors
Lee Ann Arrington-Webb
Robert A. Lowe
Chris B. Maxwell
Prakash B. Malla
Amy C. Semratedu
Cesar I. Basilio
Assignee (at issue)
Thiele Kaolin Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.