Granted Patent
Utility
US 4,280,839 · App. 06/096,130
Recovery of metal values from a metal bearing source of nickel and vanadium
Inventors:
William K. Tolley, William C. Laughlin
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Nov 1, 1979
Inventors
William K. Tolley
William C. Laughlin
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.