Granted Patent
Utility
US 4,283,578 · App. 06/152,608
Process for making glycol
Inventor:
Leonard Kaplan
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: May 23, 1980
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.