Granted Patent
Utility
US 4,417,919 · App. 06/347,400
3-Haloalkoxy-4-nitro-2'-chloro-4'-trifluoromethyldiphenyl ethers and herbicidal use thereof
Inventor:
Otto Rohr
Patented Case
View Patent ↗
Granted: Nov 29, 1983
Filed: Feb 10, 1982
Inventor
Otto Rohr
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.