Granted Patent
Utility
US 4,237,140 · App. 06/040,281
Analgesic mixture of nalbuphine and acetaminophen
Inventor:
John R. Dudzinski
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: May 18, 1979
Inventor
John R. Dudzinski
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.