Granted Patent
Utility
US 5,722,664 · App. 08/719,723
Seal with pumping capabilities
Inventor:
Dennis L. Otto
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Sep 25, 1996
Inventor
Dennis L. Otto
Assignee (at issue)
THE TIMKEN 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.