Granted Patent
Utility
US 4,415,747 · App. 06/307,074
Process for making ethylene glycol derivatives
Inventor:
Leonard Kaplan
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Sep 29, 1981
Inventor
Leonard Kaplan
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.