Granted Patent
Utility
US 4,483,840 · App. 06/551,568
Synthetic carbonaceous granules having high mechanical characteristics
Inventors:
Jean-Paul Delhay, Daniel Dumas, Paul LaCroix
Patented Case
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Granted: Nov 20, 1984
Filed: Nov 14, 1983
Inventors
Jean-Paul Delhay
Daniel Dumas
Paul LaCroix
Assignee (at issue)
Societe des Electrodes & Refractaires Savoie
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.