Granted Patent
Utility
US 4,936,591 · App. 07/416,631
Low friction radial lip seal with deformable seal casing
Inventor:
Richard Romero
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Oct 3, 1989
Inventor
Richard Romero
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.