Granted Patent
Utility
US 4,907,405 · App. 07/300,914
Process to cool gas
Inventor:
Robert J. Polizzotto
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Jan 24, 1989
Inventor
Robert J. Polizzotto
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.