Granted Patent
Utility
US 5,456,577 · App. 08/282,108
Centrifugal pump with resiliently biasing diffuser
Inventors:
Mark O'Sullivan, Timothty L. Wotring
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Jul 28, 1994
Inventors
Mark O'Sullivan
Timothty L. Wotring
Assignee (at issue)
Ingersoll-Dresser Pump 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.