Granted Patent
Utility
US 4,979,755 · App. 07/157,552
Flow dams in labyrinth seals to improve rotor stability
Inventor:
Albert F. LeBreton
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Feb 18, 1988
Inventor
Albert F. LeBreton
Assignee (at issue)
Westinghouse Electric Company LLC
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.