Granted Patent
Utility
US 4,557,735 · App. 06/581,536
Method for preparing air for separation by rectification
Inventor:
Reginald A. Pike
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Feb 21, 1984
Inventor
Reginald A. Pike
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.