Granted Patent
Utility
US 5,368,738 · App. 08/060,590
Oxidized activated carbon for the control of pH and alkalinity in water treatment applications
Inventors:
Bertrand W. Dussert, Richard A. Hayden
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: May 11, 1993
Inventors
Bertrand W. Dussert
Richard A. Hayden
Assignee (at issue)
CALGON CARBON CORPORATION
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.