Granted Patent
Utility
US 4,616,093 · App. 06/239,762
Process for preparing a diester of oxalic acid in the vapor phase
Inventors:
Louis A. Kapicak, Joseph P. Henry
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Mar 12, 1981
Inventors
Louis A. Kapicak
Joseph P. Henry
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.