Granted Patent
Utility
US 5,576,503 · App. 08/387,595
Pumping system
Inventors:
Frederick A. Nabity, Robert R. Fiedler, James Masek, Brian D. Dawson, Russell Todd Barker, Frederick Detlef Sueverkruepp, III, Ralph E. Setter, Paul George Wright, Larry Lee Fritz
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Feb 13, 1995
Inventors
Frederick A. Nabity
Robert R. Fiedler
James Masek
Brian D. Dawson
Russell Todd Barker
Frederick Detlef Sueverkruepp, III
Ralph E. Setter
Paul George Wright
Larry Lee Fritz
Assignee (at issue)
Isco, 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.