Granted Patent
Utility
US 5,177,086 · App. 07/729,851
Memory-enhancing compositions containing dioxopiperidine derivatives
Inventor:
Brenda Costall
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Jul 12, 1991
Inventor
Brenda Costall
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.