Patents Examined by Margaret Einnsmann
  • Process for reducing sulfur and vat dyes
    Patent number: 6093221
    Abstract: This invention concerns a process for reducing dyes of the group consisting of sulfur and vat dyes. The reduction is carried out in an aqueous alkali medium using isomaltulose or a mixture containing isomaltulose as the reducing agent.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: July 25, 2000
    Assignee: Sudzucker Aktiengesellschaft
    Inventors: Dietmar R. Grull, Alireza Haji Begli, Nikolai Kubadinow, Markwart Kunz, Mohammad Munir