Granted Patent
Utility
US 5,736,023 · App. 08/517,075
Polarity reversal and double reversal electrodeionization apparatus and method
Inventors:
Christopher J. Gallagher, Frederick C. Wilkins, Gary C. Ganzi
Patented Case
View Patent ↗
Granted: Apr 7, 1998
Filed: Aug 18, 1995
Inventors
Christopher J. Gallagher
Frederick C. Wilkins
Gary C. Ganzi
Assignee (at issue)
U.S. Filter/Ionpure, 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.