Granted Patent
Utility
US 4,673,679 · App. 06/863,045
Use of prodrugs of 3-hydroxymorphinans to prevent bitter taste upon buccal, nasal or sublingual administration
Inventors:
Bruce J. Aungst, Munir A. Hussain
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: May 14, 1986
Inventors
Bruce J. Aungst
Munir A. Hussain
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.