Granted Patent
Utility
US 4,345,104 · App. 06/278,962
Process for the production of ethylene glycol
Inventor:
Jean B. Cropley
Patented Case
View Patent ↗
Granted: Aug 17, 1982
Filed: Jun 30, 1981
Inventor
Jean B. Cropley
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.