Granted Patent
Utility
US 5,474,104 · App. 08/372,960
Refueling check valve for compressed natural gas powered vehicles
Inventors:
Robin N. Borland, David E. Hughes, William S. Kalaskie, John Piscatelli, Paul Rafalowski, Timothy R. Stiffy, Paul L. Wellener, III
Patented Case
View Patent ↗
Granted: Dec 12, 1995
Filed: Jan 17, 1995
Inventors
Robin N. Borland
David E. Hughes
William S. Kalaskie
John Piscatelli
Paul Rafalowski
Timothy R. Stiffy
Paul L. Wellener, III
Assignee (at issue)
Superior Valve 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.