Granted Patent
Utility
US 6,669,922 · App. 09/707,996
Installation for the production of pure hydrogen from a gas containing helium
Inventor:
Francois Fuentes
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Nov 8, 2000
Inventor
Francois Fuentes
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.