Granted Patent
Utility
US 5,650,497 · App. 08/679,841
Azo dyes, processes for their preparation and their use
Inventors:
Jean-Marie Adam, Peter Werner Sutter
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Jul 15, 1996
Inventors
Jean-Marie Adam
Peter Werner Sutter
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.