Granted Patent
Utility
US 4,404,020 · App. 06/323,604
Certain esters of 2-[(2,6-dichloro-3-pyridyl)oxy]propionic acid, compositions containing same and their herbicidal properties
Inventors:
Rolf Schurter, Niels Clauson-Kaas, Hermann Rempfler
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Nov 20, 1981
Inventors
Rolf Schurter
Niels Clauson-Kaas
Hermann Rempfler
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.