Granted Patent
Utility
US 4,376,646 · App. 06/241,295
Herbicidal N-[4-(3'-alkoxyphenoxy)-phenyl]-N'-methylureas
Inventors:
Otto Rohr, Georg Pissiotas
Patented Case
View Patent ↗
Granted: Mar 15, 1983
Filed: Mar 6, 1981
Inventors
Otto Rohr
Georg Pissiotas
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.