Granted Patent
Utility
US 5,529,314 · App. 08/119,382
Pump shaft lubricated bearing fluid seal assembly
Inventor:
Charles L. Ekstam
Patented Case
View Patent ↗
Granted: Jun 25, 1996
Filed: Sep 13, 1993
Inventor
Charles L. Ekstam
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.