Granted Patent
Utility
US 4,506,073 · App. 06/479,292
Chromenoazaindolizine compounds
Inventors:
Heinz Balli, Sigmund Gunzenhauser, Ian J. Fletcher, Davor Bedekovic
Patented Case
View Patent ↗
Granted: Mar 19, 1985
Filed: Mar 28, 1983
Inventors
Heinz Balli
Sigmund Gunzenhauser
Ian J. Fletcher
Davor Bedekovic
Assignee (at issue)
Ciba-Geigy
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.