Granted Patent
Utility
US 4,925,875 · App. 07/218,191
N-benzoyl-N'-2,5-dihalo-4-perfluoroalkoxyphenylureas, pesticidal compositions containing them and their use in the control of pests
Inventors:
Jozef Drabek, Urs Siegrist
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Jul 13, 1988
Inventors
Jozef Drabek
Urs Siegrist
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.