Granted Patent
Utility
US 4,444,563 · App. 06/414,103
Dyeing assistant and use thereof in dyeing or printing synthetic polyamide fibre materials
Inventor:
Heinz Abel
Patented Case
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Granted: Apr 24, 1984
Filed: Sep 2, 1982
Inventor
Heinz Abel
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.