Granted Patent
Utility
US 4,606,846 · App. 06/491,410
Mixed rare earth metal, divalent transition metal, aluminum oxide
Inventors:
Andree Kahn, Anne-Marie Lejus, Jeanine Thery, Daniel Vivien
Patented Case
View Patent ↗
Granted: Aug 19, 1986
Filed: May 4, 1983
Inventors
Andree Kahn
Anne-Marie Lejus
Jeanine Thery
Daniel Vivien
Assignee (at issue)
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
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.