Granted Patent
Utility
US 4,394,262 · App. 06/406,580
System for minimizing backwash water usage on self-cleaning strainers
Inventors:
Ronald G. Bukowski, Timothy L. Johnson
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Aug 6, 1982
Inventors
Ronald G. Bukowski
Timothy L. Johnson
Assignee (at issue)
ZURN INDUSTRIES, LLC
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.