Granted Patent
Utility
US 4,701,309 · App. 06/676,843
Method of operating a heap leach for recovering uranium and vanadium
Inventors:
Sundaresan Ramachandran, David O. Skiles, Donald J. Hansen
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Nov 30, 1984
Inventors
Sundaresan Ramachandran
David O. Skiles
Donald J. Hansen
Assignee (at issue)
Umetco Minerals Corporation
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.