Granted Patent
Utility
US 4,452,497 · App. 06/519,423
Grease seal for bearing arrangement
Inventor:
Paul J. Zillhardt
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Aug 1, 1983
Inventor
Paul J. Zillhardt
Assignee (at issue)
Rockwell International Corporation
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.