Granted Patent
Utility
US 4,900,347 · App. 07/333,214
Cryogenic separation of gaseous mixtures
Inventors:
Richard H. McCue, Jr., John L. Pickering, Jr.
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Apr 5, 1989
Inventors
Richard H. McCue, Jr.
John L. Pickering, Jr.
Assignee (at issue)
Mobil 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.