Granted Patent
Utility
US 4,447,358 · App. 06/308,691
Monoazo compounds
Inventors:
Hansrudolf Schwander, Peter Furrer
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Oct 5, 1981
Inventors
Hansrudolf Schwander
Peter Furrer
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.