Granted Patent
Utility
US 5,855,858 · App. 08/660,290
Process for the recovery of nickel and/or cobalt from an ore or concentrate
Inventor:
David L. Jones
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Jun 7, 1996
Inventor
David L. Jones
Assignee (at issue)
Cominco Engineering Services Ltd.
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.