Granted Patent
Utility
US 5,401,834 · App. 08/081,927
Asymmetrical 1:2 chromium and cobalt complexes of further substituted 6- or 7-amino-1-hydroxy-2-(nitro-phenylazo)-3-sulfonapthalenes
Inventor:
Klaus Koerte
Patented Case
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Granted: Mar 28, 1995
Filed: Jun 22, 1993
Inventor
Klaus Koerte
Assignee (at issue)
Sandoz AG
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.