Granted Patent
Utility
US 4,569,937 · App. 06/700,654
Analgesic mixture of oxycodone and ibuprofen
Inventors:
Geraldine L. Baker, William K. Schmidt
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Feb 11, 1985
Inventors
Geraldine L. Baker
William K. Schmidt
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.