Granted Patent
Utility
US 5,599,459 · App. 08/488,837
Method for sealing a traveling bridge filter backwash shoe
Inventor:
Mack McDougald
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Jun 9, 1995
Inventor
Mack McDougald
Assignee (at issue)
Davis Water & Waste Industries, Inc.
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.