Granted Patent
Utility
US 6,722,256 · App. 10/242,595
Reduced icing valves and gas-driven motor and diaphragm pump incorporating same
Inventors:
Charles O. Roberts, Michael Conti, Nicholas Kozumplik, Jr., Gordon M. Schroeder
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Sep 12, 2002
Inventors
Charles O. Roberts
Michael Conti
Nicholas Kozumplik, Jr.
Gordon M. Schroeder
Assignee (at issue)
Ingersoll-Rand 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.