Granted Patent
Utility
US 5,087,628 · App. 07/464,433
4,4'-[9H-fluoren-9-ylidenebis (methylene)]bispyrimidine for treating neurological disorders
Inventors:
Richard A. Earl, Victor J. DeNoble
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Jan 12, 1990
Inventors
Richard A. Earl
Victor J. DeNoble
Assignee (at issue)
The DuPont Merck Pharmaceutical 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.