Granted Patent
Utility
US 4,894,162 · App. 07/187,035
Treatment of volatile organic substances at waste water treatment plants
Inventors:
Richard L. Cournoyer, Thomas Jakopp, G. Eric Friberg
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Apr 27, 1988
Inventors
Richard L. Cournoyer
Thomas Jakopp
G. Eric Friberg
Assignee (at issue)
Ciba-Geigy
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.