Granted Patent
Utility
US 4,540,562 · App. 06/498,710
Process for the production of vanadyl hydrate
Inventor:
Harry E. Gardner
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: May 27, 1983
Inventor
Harry E. Gardner
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.