Granted Patent
Utility
US 5,951,243 · App. 08/889,882
Rotor bearing system for molten metal pumps
Inventor:
Paul V. Cooper
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Jul 3, 1997
Inventor
Paul V. Cooper
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.