Granted Patent
Utility
US 4,650,552 · App. 06/775,887
Electrolytic production of aluminum
Inventors:
Vittorio de Nora, Jurgen Gauger, Jean-Marie Fresnel, Iudita L. Adorian, Jean-Jacques Duruz
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Sep 13, 1985
Inventors
Vittorio de Nora
Jurgen Gauger
Jean-Marie Fresnel
Iudita L. Adorian
Jean-Jacques Duruz
Assignee (at issue)
Eltech Systems 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.