Granted Patent
Utility
US 5,595,642 · App. 08/558,530
Pressure leaching of nickel and cobalt sulphides with chlorine under controlled redox potential conditions
Inventors:
Tao Xue, Ronald R. Dunn
Patented Case
View Patent ↗
Granted: Jan 21, 1997
Filed: Nov 16, 1995
Inventors
Tao Xue
Ronald R. Dunn
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.