Granted Patent
Utility
US 6,830,683 · App. 10/127,914
Filter cartridge assembly with brine seal and retaining ring
Inventors:
Robert R. Gundrum, Jeffrey J. Julich
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Apr 23, 2002
Inventors
Robert R. Gundrum
Jeffrey J. Julich
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.