Granted Patent
Utility
US 4,626,539 · App. 06/741,762
Trandermal delivery of opioids
Inventors:
Bruce J. Aungst, Robert DiLuccio
Patented Case
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Granted: Dec 2, 1986
Filed: Jun 10, 1985
Inventors
Bruce J. Aungst
Robert DiLuccio
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.