Granted Patent
Utility
US 4,328,192 · App. 06/140,048
Ammoniacal nickel leach of laterites
Inventors:
William K. Tolley, Francisco J. Corral
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: Apr 14, 1980
Inventors
William K. Tolley
Francisco J. Corral
Assignee (at issue)
UOP 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.