Granted Patent
Utility
US 5,616,168 · App. 08/409,661
Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper
Inventors:
Philip J. Gabb, J. Philip Evans
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: Mar 24, 1995
Inventors
Philip J. Gabb
J. Philip Evans
Assignee (at issue)
Kennecott Utah Copper 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.