Granted Patent
Utility
US 6,568,428 · App. 09/812,104
Backwash valve
Inventors:
Gene L. Pecci, Bruce W. Maskell
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Mar 19, 2001
Inventors
Gene L. Pecci
Bruce W. Maskell
Assignee (at issue)
Laars, 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.