Granted Patent
Utility
US 4,312,841 · App. 06/162,970
Enhanced hydrometallurgical recovery of cobalt and nickel from laterites
Inventors:
William K. Tolley, Pieter D. Rademaker
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Jun 25, 1980
Inventors
William K. Tolley
Pieter D. Rademaker
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.