Granted Patent
Utility
US 5,498,142 · App. 08/454,589
Hardfacing for progressing cavity pump rotors
Inventor:
Robert A. R. Mills
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: May 30, 1995
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.