Granted Patent
Utility
US 4,152,114 · App. 05/899,162
Method of dyeing with dispersible azo anilino dyestuffs
Inventors:
Stefan Koller, Dieter Reinker, Hans Rudolf Schwander
Patented Case
View Patent ↗
Granted: May 1, 1979
Filed: Apr 24, 1978
Inventors
Stefan Koller
Dieter Reinker
Hans Rudolf 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.