Granted Patent
Utility
US 4,585,730 · App. 06/697,378
Antistatic backing layer with auxiliary layer for a silver halide element
Inventor:
Thomas Byunghak Cho
Patented Case
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Granted: Apr 29, 1986
Filed: Jan 16, 1985
Inventor
Thomas Byunghak Cho
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.