Granted Patent
Utility
US 4,871,301 · App. 07/161,585
Centrifugal pump bearing arrangement
Inventor:
Frederic W. Buse
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Feb 29, 1988
Inventor
Frederic W. Buse
Assignee (at issue)
Ingersoll-Rand Company
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.