Granted Patent
Utility
US 4,840,756 · App. 06/928,154
Radiation process for preparation of electrophoresis gel material
Inventors:
Richard C. Ebersole, Robert P. Foss
Patented Case
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Granted: Jun 20, 1989
Filed: Nov 7, 1986
Inventors
Richard C. Ebersole
Robert P. Foss
Assignee (at issue)
E I DU PONT 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.