Granted Patent
Utility
US 5,029,821 · App. 07/444,684
Apparatus for controlling the magnesium content of molten aluminum
Inventors:
Ari Bar-on, Kenneth L. Gallaher, Jonathan Greenberg, David Neff, Douglas H. Rothenberg
Patented Case
View Patent ↗
Granted: Jul 9, 1991
Filed: Dec 1, 1989
Inventors
Ari Bar-on
Kenneth L. Gallaher
Jonathan Greenberg
David Neff
Douglas H. Rothenberg
Assignee (at issue)
Carborundum 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.