Granted Patent
Utility
US 6,354,824 · App. 09/522,146
Ceramic hardfacing for progressing cavity pump rotors
Inventor:
Robert A. R. Mills
Patented Case
View Patent ↗
Granted: Mar 12, 2002
Filed: Mar 9, 2000
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.