Granted Patent
Utility
US 6,704,947 · App. 10/061,673
Discharge valve for a vacuum toilet
Inventors:
Jay D. Stradinger, William Bruce Anderson, Mark A. Pondelick, Douglas M. Wallace, Michael B. Hancock, Arthur J. McGowan, Jr., Ian Tinkler
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Feb 1, 2002
Inventors
Jay D. Stradinger
William Bruce Anderson
Mark A. Pondelick
Douglas M. Wallace
Michael B. Hancock
Arthur J. McGowan, Jr.
Ian Tinkler
Assignee (at issue)
Evac International Oy
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.