Granted Patent
Utility
US 4,699,652 · App. 06/885,368
Fungicidal pyridine derivatives for use in agriculture
Inventor:
Beat Zehnder
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Jul 14, 1986
Inventor
Beat Zehnder
Assignee (at issue)
HOFFMANN-LA ROCHE INC.
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.