Granted Patent
Utility
US 4,497,967 · App. 06/621,271
Process for the preparation of ethanol from methanol, carbon monoxide _and hydrogen
Inventor:
Chee-Gen Wan
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Jun 15, 1984
Inventor
Chee-Gen Wan
Assignee (at issue)
The Halcon SD Group, Inc.
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.