Granted Patent
Utility
US 4,724,231 · App. 06/848,690
Nasel compositions containing vitamin B.sub.12
Inventor:
Jeffrey Wenig
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Apr 8, 1986
Inventor
Jeffrey Wenig
Assignee (at issue)
Nastech Pharmaceutical Company, Inc.
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.