Granted Patent
Utility
US 5,645,896 · App. 08/588,141
Method of applying a filled in metal carbide hard facing to the rotor of a progressing cavity pump
Inventor:
Robert A. R. Mills
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Jan 18, 1996
Inventor
Robert A. R. Mills
Assignee (at issue)
Kudu Industries 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.