Granted Patent
Utility
US 4,589,911 · App. 06/606,076
Fused N-phenylsulfonyl-N-triazinylureas
Inventors:
Josef Ehrenfreund, Werner Fory
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: May 1, 1984
Inventors
Josef Ehrenfreund
Werner Fory
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.