Granted Patent
Utility
US 6,093,329 · App. 08/726,470
Air scour/backwash apparatus for celless traveling bridge filter
Inventor:
Mack McDougald
Patented Case
View Patent ↗
Granted: Jul 25, 2000
Filed: Oct 4, 1996
Inventor
Mack McDougald
Assignee (at issue)
United States Filter 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.