Granted Patent
Utility
US 4,875,923 · App. 07/114,993
N-pyridinylsulfonyl-N'-pyrimidinylures
Inventors:
Rolf Schurter, Willy Meyer, Werner Fory
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Oct 26, 1987
Inventors
Rolf Schurter
Willy Meyer
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.