Granted Patent
Utility
US 4,555,262 · App. 06/525,365
N-Azidophenylsulfonyl-N'-pyrimidinyl ureas
Inventors:
Rudolph C. Thummel, Werner Fory
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Aug 22, 1983
Inventors
Rudolph C. Thummel
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.