Granted Patent
Utility
US 4,259,236 · App. 06/015,511
Azo compounds, containing a 1,2,4-thiadiazole moiety
Inventors:
Stefan Koller, Rudolf Zink, Hansrudolf Schwander
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Feb 26, 1979
Inventors
Stefan Koller
Rudolf Zink
Hansrudolf Schwander
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.