Granted Patent
Utility
US 6,730,719 · App. 09/848,965
Process for treating smectite clays to facilitate exfoliation
Inventor:
Clois E. Powell
Patented Case
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Granted: May 4, 2004
Filed: May 4, 2001
Inventor
Clois E. Powell
Assignee (at issue)
Southern Clay Products, Inc.
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.