Granted Patent
Utility
US 4,534,867 · App. 06/590,575
System for removing iron and/or other chemically reducing substances from potable water
Inventors:
Edward G. Kreusch, Bruce F. Brodzik
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Mar 16, 1984
Inventors
Edward G. Kreusch
Bruce F. Brodzik
Assignee (at issue)
CULLIGAN INTERNATIONAL COMPANY
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.