Granted Patent
Utility
US 4,743,296 · App. 06/936,214
Heterocyclically fused pyridine compounds as herbicides
Inventors:
Dieter Durr, Hans-Georg Brunner, Henry Szczepanski
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Dec 1, 1986
Inventors
Dieter Durr
Hans-Georg Brunner
Henry Szczepanski
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.