Granted Patent
Utility
US 4,450,291 · App. 06/490,636
Decontamination of KA oil refinement waste stream
Inventors:
Ching T. Chi, J. Harvey Lester, Jr.
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: May 2, 1983
Inventors
Ching T. Chi
J. Harvey Lester, Jr.
Assignee (at issue)
Monsanto Company
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.