Granted Patent
Utility
US 4,421,939 · App. 06/434,562
Production of ethanol from acetic acid
Inventors:
Ben W. Kiff, David James Schreck
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Oct 15, 1982
Inventors
Ben W. Kiff
David James Schreck
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.