Granted Patent
Utility
US 6,041,939 · App. 09/045,842
Beneficiation with selective flocculation using hydroxamates
Inventors:
Joseph C. S. Shi, Charles Lamar Williams, Robert A. Lowe, Cesar I. Basilio
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Mar 20, 1998
Inventors
Joseph C. S. Shi
Charles Lamar Williams
Robert A. Lowe
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.