Granted Patent
Utility
US 6,406,675 · App. 09/660,975
Method for reducing cyanide consumption during processing of gold and silver ores to remove base metals
Inventor:
Terrence P. Small
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Sep 13, 2000
Inventor
Terrence P. Small
Assignee (at issue)
HERCULES LLC
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.