Granted Patent
Utility
US 5,209,499 · App. 07/888,956
Unitized polytetrafluoroethylene radial lip seal
Inventors:
Donald N. Ruff, Jr., Mark M. Migda
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: May 26, 1992
Inventors
Donald N. Ruff, Jr.
Mark M. Migda
Assignee (at issue)
Mather Seal Company
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.