Granted Patent
Utility
US 4,897,416 · App. 07/153,696
Insecticides and parasiticides
Inventors:
Bruno Frei, Anthony C. Sullivan
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Feb 8, 1988
Inventors
Bruno Frei
Anthony C. Sullivan
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.