Granted Patent
Utility
US 4,477,416 · App. 06/424,641
Salt roasting of vanadium ore in the presence of carbon
Inventor:
John Goddard
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Sep 27, 1982
Inventor
John Goddard
Assignee (at issue)
Union Carbide 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.