Patents by Inventor Mieke Schaffeld

Mieke Schaffeld has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6228131
    Abstract: Dye mixtures comprising water-soluble fiber-reactive azo dyes, preparation thereof and use thereof Described are dye mixtures comprising yellow dyes of the formulae indicated and defined in claim 1, which are useful for dyeing hydroxyl- and/or carboxamido-containing material, especially fiber material, such as cellulose fibers, for example cotton and filament viscose, and wool and also synthetic polyamide fibers.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: May 8, 2001
    Assignee: Dystar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Bengt-Thomas Gröbel, Christian Schumacher, Gerhard Lippert, Mieke Schaffeld, Karl Krieger, Dierk Röhrig
  • Patent number: 6168636
    Abstract: Disclosed are dye mixtures comprising yellow dyes of the formulae indicated and defined in claim 1 which are useful for dyeing hydroxy- and/or carboxamido-containing material, especially fiber material, such as cellulose fibers, for example cotton and filament viscose, and wool and also synthetic polyamide fibers.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: January 2, 2001
    Assignee: Dystar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Bengt-Thomas Gröbel, Christian Schumacher, Birgit Eden, Mieke Schaffeld, Karl Krieger, Dierk Röhrig
  • Patent number: 6165231
    Abstract: Described are dye mixtures comprising dyes containing a coupling component comprising a 1-(chlorotriazinyl)amino-3,6-disulfo-8-naphthol radical, the dye or dyes of the one group of dyes containing an optionally loweralkyl-, loweralkoxy-, halogen, sulfo- and/or carboxy-substituted phenylamino or naphthylamino radical attached to the chlorotriazine radical and possessing a diazo component comprising an optionally loweralkyl-, loweralkoxy-, sulfo- and/or carboxy-substituted phenyl radical which is substituted by a fiber-reactive group of the vinyl sulfone series, and the dye or dyes of the other group of dyes containing attached to the chlorotriazine radical a phenylamino radical whose phenyl is substituted by a fiber-reactive group of the vinyl sulfone series and may be substituted by lower alkyl, lower alkoxy, sulfo and/or carboxy, and possessing a diazo component comprising a radical of benzene or naphthalene which may in each case be optionally substituted by lower alkyl, lower alkoxy, halogen, sulfo and/Qr
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: December 26, 2000
    Assignee: Dystar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Bengt-Thomas Grobel, Christian Schumacher, Mieke Schaffeld, Karl Krieger, Dierk Rohrig