Granted Patent
Utility
US 6,662,951 · App. 09/672,065
Process for extracting and purifying naturally occurring zeolite
Inventor:
Billy D. Fellers
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Sep 27, 2000
Inventor
Billy D. Fellers
Assignee (at issue)
Basic Resources, 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.