Granted Patent
Utility
US 6,164,727 · App. 09/223,954
Method of mining a soluble mineral
Inventor:
Melvin E. Kelly
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Dec 31, 1998
Inventor
Melvin E. Kelly
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.