Granted Patent
Utility
US 4,416,677 · App. 06/381,844
Split shelf vapor air separation process
Inventor:
Ravindra F. Pahade
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: May 25, 1982
Inventor
Ravindra F. Pahade
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.