Granted Patent
Utility
US 4,284,566 · App. 06/106,797
Herbicidal .alpha.-[4-trifluoromethylphenoxy)-propionic acid .gamma.-butyrolactone ester and thioester
Inventors:
Beat Bohner, Hermann Rempfler
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Dec 26, 1979
Inventors
Beat Bohner
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.