Granted Patent
Utility
US 6,407,358 · App. 09/785,313
Process and unit for plasma-arc working with a gas having controlled O2 and N2 contents
Inventors:
Regis Augeraud, Serge Suzon, Michel Delzenne
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Feb 20, 2001
Inventors
Regis Augeraud
Serge Suzon
Michel Delzenne
Assignee (at issue)
L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude
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.