Granted Patent
Utility
US 6,152,164 · App. 09/359,505
Pressure-drop activated trap seal primer valve
Inventor:
Michael J. Whiteside
Patented Case
View Patent ↗
Granted: Nov 28, 2000
Filed: Jul 23, 1999
Inventor
Michael J. Whiteside
Assignee (at issue)
MIFAB, 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.