Granted Patent
Utility
US 4,401,448 · App. 06/381,465
Air separation process for the production of krypton and xenon
Inventor:
Louis M. La Clair
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: May 24, 1982
Inventor
Louis M. La Clair
Assignee (at issue)
Union Carbide Corporation
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.