Granted Patent
Utility
US 4,634,465 · App. 06/512,091
Fused N-phenylsulfonyl-N'-pyrimidinylureas and N-phenylsulfonyl-N'triazinylureas
Inventors:
Josef Ehrenfreund, Werner Fory, Willy Meyer, Werner Topfl
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Jul 8, 1983
Inventors
Josef Ehrenfreund
Werner Fory
Willy Meyer
Werner Topfl
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.