Granted Patent
Utility
US 4,932,997 · App. 06/719,614
N-heterocyclosulfonyl-N'-pyrimidinylureas and N-heterocyclosulfonyl-N'-triazinylureas
Inventors:
Rolf Schurter, Willy Meyer, Werner Fory
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Apr 3, 1985
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.