Granted Patent
Utility
US 5,792,373 · App. 08/656,591
Backwash filter system
Inventors:
Kenneth Thomas Bennick, Michael E. Isch, David Lee Truman, Robert Wegner
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: May 31, 1996
Inventors
Kenneth Thomas Bennick
Michael E. Isch
David Lee Truman
Robert Wegner
Assignee (at issue)
Delaware Capital Formation, 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.