Granted Patent
Utility
US 5,385,409 · App. 08/103,103
Non-contacting mechanical face seal of the gap-type
Inventor:
Russell D. Ide
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Aug 9, 1993
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.