Granted Patent
Utility
US 4,588,721 · App. 06/674,616
Treatment of negative symptoms of schizophrenia
Inventor:
Donald R. Mahan
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Nov 26, 1984
Inventor
Donald R. Mahan
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.