Granted Patent
Utility
US 6,685,191 · App. 09/779,820
Mechanical seal for rotating shaft
Inventor:
Keith R. Toal
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Feb 8, 2001
Inventor
Keith R. Toal
Assignee (at issue)
A.W. CHESTERTON 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.