Granted Patent
Utility
US 4,871,750 · App. 07/206,273
Use of dioxopiperidine derivatives as analgesics
Inventor:
Malcolm H. T. Roberts
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Jun 14, 1988
Inventor
Malcolm H. T. Roberts
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.