Granted Patent
Utility
US 4,833,235 · App. 07/106,100
Sulfo group-containing disaz compounds having a heterocyclic coupling component radical
Inventor:
Reinhard Pedrazzi
Patented Case
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Granted: May 23, 1989
Filed: Oct 7, 1987
Inventor
Reinhard Pedrazzi
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.