Granted Patent
Utility
US 5,004,482 · App. 07/350,772
Production of dry, high purity nitrogen
Inventors:
Oscar W. Haas, Ravi Prasad, James Smolarek
Patented Case
View Patent ↗
Granted: Apr 2, 1991
Filed: May 12, 1989
Inventors
Oscar W. Haas
Ravi Prasad
James Smolarek
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.