Granted Patent
Utility
US 6,200,377 · App. 09/293,298
Process for beneficiation of mixtures of mineral particles
Inventors:
Cesar I. Basilio, J. Michael Randolph
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Apr 16, 1999
Inventors
Cesar I. Basilio
J. Michael Randolph
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.