Granted Patent
Utility
US 4,412,856 · App. 06/266,264
Herbicidal heterocyclic and substituted phenyl phenylacetylene amines
Inventors:
Hans-Georg Brunner, Rolf Schurter, Henry Szczepanski
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: May 22, 1981
Inventors
Hans-Georg Brunner
Rolf Schurter
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.