Granted Patent
Utility
US 5,112,975 · App. 07/406,988
Preparation of noroxymorphone from morphine
Inventor:
Rebecca A. Wallace
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Sep 14, 1989
Inventor
Rebecca A. Wallace
Assignee (at issue)
Mallinckrodt Specialty Chemicals 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.