Granted Patent
Utility
US 5,368,739 · App. 08/115,214
Activated carbon oxidized by air at near ambient temperatures for the control of ph and in water treatment applications
Inventors:
Bertrand W. Dussert, Richard A. Hayden, John R. Lutchko, Kishio Yoshino, Satoru Hisaki, Fujito Ehara
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Sep 1, 1993
Inventors
Bertrand W. Dussert
Richard A. Hayden
John R. Lutchko
Kishio Yoshino
Satoru Hisaki
Fujito Ehara
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.