Granted Patent
Utility
US 5,616,250 · App. 08/481,994
Method for mixing coagulating agents into a contaminated water flow, and for removing contaminants therefrom
Inventors:
Dennis E. J. Johnson, Clifford F. Frith
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: Jun 7, 1995
Inventors
Dennis E. J. Johnson
Clifford F. Frith
Assignee (at issue)
Aqua-Ion Systems, 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.