Granted Patent
Utility
US 4,973,711 · App. 07/380,844
Composition for controlling parasites in productive livestock
Inventor:
Peter Maienfisch
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Jul 13, 1989
Inventor
Peter Maienfisch
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.