Granted Patent
Utility
US 4,587,110 · App. 06/639,370
Process of recovering copper and of optionally recovering silver and gold by a leaching of oxide- and sulfide-containing materials with water-soluble cyanides
Inventors:
George M. Potter, Arthur Bergmann, Ulrich Haidlen
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Aug 8, 1984
Inventors
George M. Potter
Arthur Bergmann
Ulrich Haidlen
Assignee (at issue)
MNR Reprossesing, Inc.
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.