Granted Patent
Utility
US 4,333,740 · App. 06/219,746
Process for the separation of water from ethanol
Inventor:
James W. Priegnitz
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Dec 23, 1980
Inventor
James W. Priegnitz
Assignee (at issue)
UOP LLC
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.