Granted Patent
Utility
US 5,246,295 · App. 07/785,005
Non-contacting mechanical face seal of the gap-type
Inventor:
Russell D. Ide
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Oct 30, 1991
Inventor
Russell D. Ide
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.