Granted Patent
Utility
US 5,685,994 · App. 08/627,277
Method for water treatment and purification using gas ion plasma source and disinfectant metal ion complexes
Inventor:
Dennis E. J. Johnson
Patented Case
View Patent ↗
Granted: Nov 11, 1997
Filed: Apr 4, 1996
Inventor
Dennis E. J. Johnson
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.