Patents Represented by Attorney Ernest C. Szoke

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  • Process for the production of 5,6-dihydroxyindolines
    Patent number: 5399713
    Abstract: Process for the production of 5,6-dihydroxyindolines by ether cleavage of corresponding ether procursors with aqueous hydrogen bromide and subsequent direct crystallization from the aqueous reaction mixture.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: March 21, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Georg Knuebel, Guenther Konard, Roswitha Michel