Granted Patent
Utility
US 5,525,214 · App. 08/298,044
Filter cartridge for water treatment device
Inventor:
Richard D. Hembree
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Aug 30, 1994
Inventor
Richard D. Hembree
Assignee (at issue)
Recovery Engineering, 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.