Granted Patent
Utility
US 4,808,316 · App. 07/011,864
Process for treating waste water containing uranium and fluorine
Inventors:
Keiichiro Otomura, Yoshikazu Ogura, Yoshiaki Echigo, Mutsunori Yamao, Tadashi Ishikura
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Feb 4, 1987
Inventors
Keiichiro Otomura
Yoshikazu Ogura
Yoshiaki Echigo
Mutsunori Yamao
Tadashi Ishikura
Assignees (at issue)
UNITIKA LTD.
Doryokuro Kakunenryo Kaihatsu Jigyodan
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.