Granted Patent
Utility
US 4,814,078 · App. 07/096,906
Water filter cartridge
Inventors:
Richard J. Stern, Alfons Rundzaitis, Samuel F. Peterson
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Sep 15, 1987
Inventors
Richard J. Stern
Alfons Rundzaitis
Samuel F. Peterson
Assignee (at issue)
The Mills 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.