Granted Patent
Utility
US 5,665,239 · App. 08/585,821
Processes for deionization and demineralization of fluids
Inventors:
Arthur Katzakian, Jr., Donald C. McGehee, Charles Grix, Frank A. Brigano
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Jan 16, 1996
Inventors
Arthur Katzakian, Jr.
Donald C. McGehee
Charles Grix
Frank A. Brigano
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.