Granted Patent
Utility
US 5,148,680 · App. 07/544,641
Cryogenic air separation system with dual product side condenser
Inventor:
James R. Dray
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Jun 27, 1990
Inventor
James R. Dray
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.