Granted Patent
Utility
US 4,083,921 · App. 05/756,491
Purifying molybdenum flotation concentrates
Inventor:
Rolf J. Wesely
Patented Case
View Patent ↗
Granted: Apr 11, 1978
Filed: Jan 3, 1977
Inventor
Rolf J. Wesely
Assignee (at issue)
Kennecott Copper 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.