Granted Patent
Utility
US 5,401,139 · App. 07/807,200
Pumping system
Inventors:
Frederick A. Nabity, Paul George Wright, Raymond Hulinsky, Douglas T. Carson
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Dec 16, 1991
Inventors
Frederick A. Nabity
Paul George Wright
Raymond Hulinsky
Douglas T. Carson
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.