Granted Patent
Utility
US 6,370,709 · App. 09/713,967
Discharge valve having a disk with a flushing aperture and an air intake aperture 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: Apr 16, 2002
Filed: Nov 16, 2000
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.