Granted Patent
Utility
US 6,312,500 · App. 09/539,063
Heap leaching of nickel containing ore
Inventors:
Willem P. C. Duyvesteyn, Houyuan Liu, Michael J. Davis
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Mar 30, 2000
Inventors
Willem P. C. Duyvesteyn
Houyuan Liu
Michael J. Davis
Assignee (at issue)
BHP Minerals International 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.