Granted Patent
Utility
US 4,412,855 · App. 05/944,816
"2-Chloro-N-(2'-methoxypropyl)- and 2-chloro-N-(2'-ethoxypropyl)-2"",6""-dimethyl-acetanilide as long term weed killers"
Inventors:
Christian Vogel, Rudolf Aebi
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Sep 22, 1978
Inventors
Christian Vogel
Rudolf Aebi
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.