Granted Patent
Utility
US 4,244,675 · App. 06/034,634
Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies
Inventor:
John R. Bower
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: Apr 30, 1979
Inventor
John R. Bower
Assignee (at issue)
Worthington Pump, 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.