Granted Patent
Utility
US 6,367,810 · App. 09/504,677
Self-centering shaft seal system
Inventor:
Frederick R. Hatch
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Feb 15, 2000
Inventor
Frederick R. Hatch
Assignee (at issue)
Federal-Mogul Worldwide, 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.