Granted Patent
Utility
US 4,628,129 · App. 06/697,927
Process for the preparation of ethylene glycol
Inventor:
William J. Bartley
Patented Case
View Patent ↗
Granted: Dec 9, 1986
Filed: Feb 4, 1985
Inventor
William J. Bartley
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.