Granted Patent
Utility
US 5,272,269 · App. 07/821,571
Disubstituted polycyclic systems and preparative methods therefor
Inventors:
James H. Jensen, Timothy D. Costello, Leon De Brabander, Jr., Matthew E. Voss
Patented Case
View Patent ↗
Granted: Dec 21, 1993
Filed: Jan 16, 1992
Inventors
James H. Jensen
Timothy D. Costello
Leon De Brabander, Jr.
Matthew E. Voss
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.