Granted Patent
Utility
US 6,574,988 · App. 09/937,821
Process and plant for producing argon by cryogenic distillation
Inventors:
Bernard Saulnier, Jean-Pierre Gourbier
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Sep 28, 2001
Inventors
Bernard Saulnier
Jean-Pierre Gourbier
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.