Granted Patent
Utility
US 6,346,197 · App. 09/494,219
Water and wastewater treatment system and process for contaminant removal
Inventors:
Robert John Stephenson, Bruce D. Tennant, Donald Hartle
Patented Case
View Patent ↗
Granted: Feb 12, 2002
Filed: Jan 28, 2000
Inventors
Robert John Stephenson
Bruce D. Tennant
Donald Hartle
Assignee (at issue)
McKay Creek Technologies, Ltd.
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.