Granted Patent
Utility
US 6,179,070 · App. 09/182,623
Vacuum tank for use in handling oil and gas well cuttings
Inventor:
Gary H. Dietzen
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Oct 29, 1998
Inventor
Gary H. Dietzen
Assignee (at issue)
M-I L.L.C.
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.