Granted Patent
Utility
US 5,215,448 · App. 07/813,560
Combined boiler feed and condensate pump
Inventor:
Paul V. Cooper
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Dec 26, 1991
Inventor
Paul V. Cooper
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.