Granted Patent
Utility
US 4,931,439 · App. 07/255,684
Pesticides
Inventor:
Haukur Kristinsson
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Oct 11, 1988
Inventor
Haukur Kristinsson
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.