Granted Patent
Utility
US 4,663,454 · App. 06/723,993
Process to prepare .alpha.-chloroalprazolam
Inventor:
Joel E. Huber
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Apr 17, 1985
Inventor
Joel E. Huber
Assignee (at issue)
The Upjohn Co.
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.