Granted Patent
Utility
US 5,137,642 · App. 07/823,400
Detoxification of aqueous cyanide solutions
Inventors:
Harry M. Castrantas, Michael Fagan
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Jan 21, 1992
Inventors
Harry M. Castrantas
Michael Fagan
Assignee (at issue)
FMC 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.