Granted Patent
Utility
US 5,605,444 · App. 08/578,299
Pump impeller having separate offset inlet vanes
Inventors:
Alan Stewart Paton, Bruno Schiavello, Giovanni Rigamonti
Patented Case
View Patent ↗
Granted: Feb 25, 1997
Filed: Dec 26, 1995
Inventors
Alan Stewart Paton
Bruno Schiavello
Giovanni Rigamonti
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.