Granted Patent
Utility
US 4,510,100 · App. 06/559,149
Process for the production of 2-amino-1-naphthalenesulfonic acid
Inventors:
Eric Plattner, Sebastian Staubli, Fred von Kaenel
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Dec 7, 1983
Inventors
Eric Plattner
Sebastian Staubli
Fred von Kaenel
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.