Granted Patent
Utility
US 5,499,826 · App. 08/356,684
Anti-extrusion lip seal
Inventors:
Aaron J. Pippert, Frederick B. Pippert
Patented Case
View Patent ↗
Granted: Mar 19, 1996
Filed: Dec 15, 1994
Inventors
Aaron J. Pippert
Frederick B. Pippert
Assignee (at issue)
Utex Industries 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.