Granted Patent
Utility
US 4,519,880 · App. 06/540,520
Processes for the recovery of cyanide from aqueous thiocyanate solutions and detoxication of aqueous thiocyanate solutions
Inventors:
John J. Byerley, Kurt Enns
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Oct 7, 1983
Inventors
John J. Byerley
Kurt Enns
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.