Granted Patent
Utility
US 5,569,658 · App. 08/275,754
Tricyclic derivatives
Inventor:
Andrew J. Barker
Patented Case
View Patent ↗
Granted: Oct 29, 1996
Filed: Jul 19, 1994
Inventor
Andrew J. Barker
Assignee (at issue)
Zeneca Limited
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.