Granted Patent
Utility
US 4,744,721 · App. 06/924,563
Turbopump sealing device
Inventor:
Michel Villeneuve
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Oct 28, 1986
Inventor
Michel Villeneuve
Assignee (at issue)
EG&G Sealol, 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.