Granted Patent
Utility
US 5,618,426 · App. 08/490,656
Lateral member assembly for underdrain lateral system
Inventors:
Frederick W. Eischen, Stephen A. Uban, Richard C. Maxson
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Jun 15, 1995
Inventors
Frederick W. Eischen
Stephen A. Uban
Richard C. Maxson
Assignee (at issue)
Wheelabrator Water Technologies 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.