Granted Patent
Utility
US 4,250,159 · App. 06/143,888
Small scale chlorine dioxide plant
Inventor:
Gerald Cowley
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Apr 25, 1980
Inventor
Gerald Cowley
Assignee (at issue)
ERCO Industries Limited
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.