Granted Patent
Utility
US 4,484,752 · App. 06/587,371
Rotating-lip bidirectional hydrodynamic oil seal
Inventor:
Gustavus A. Bentley
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Mar 8, 1984
Inventor
Gustavus A. Bentley
Assignee (at issue)
Federal-Mogul 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.