Granted Patent
Utility
US 5,051,007 · App. 07/415,841
Lubrication of a centrifugal pump bearing
Inventors:
George J. Maddox, Leon K. Stanmore, Terry M. Wold
Patented Case
View Patent ↗
Granted: Sep 24, 1991
Filed: Oct 2, 1989
Inventors
George J. Maddox
Leon K. Stanmore
Terry M. Wold
Assignee (at issue)
National Oilwell, 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.