Granted Patent
Utility
US 4,478,637 · App. 06/474,743
Thermal reduction process for production of magnesium
Inventors:
Roy A. Christini, Rolf Rolles, Kenneth A. Bowman, Marlyn D. Ballain
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Mar 10, 1983
Inventors
Roy A. Christini
Rolf Rolles
Kenneth A. Bowman
Marlyn D. Ballain
Assignee (at issue)
Aluminum Company of America
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.