Granted Patent
Utility
US 6,183,632 · App. 09/474,063
Arrangement for filtering liquid used in a device having a sump pan
Inventor:
Edward Allen Covington
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Dec 29, 1999
Inventor
Edward Allen Covington
Assignee (at issue)
DANA LIMITED
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.