Granted Patent
Utility
US 5,264,136 · App. 07/969,023
Methods for generating residual disinfectants during the ozonization of water
Inventors:
Jonathan N. Howarth, Ahmad Dadgar, Julie A. McKeown, Rodney H. Sergent
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: Oct 30, 1992
Inventors
Jonathan N. Howarth
Ahmad Dadgar
Julie A. McKeown
Rodney H. Sergent
Assignee (at issue)
Great Lakes Chemical Corp.
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.