Granted Patent
Utility
US 5,116,396 · App. 07/539,808
Hybrid prepurifier for cryogenic air separation plants
Inventors:
Ravi Prasad, Frank Notaro, Oscar W. Haas
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Jun 18, 1990
Inventors
Ravi Prasad
Frank Notaro
Oscar W. Haas
Assignee (at issue)
Union Carbide Industrial Gases Technology 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.