Patents by Inventor Hanswilli von Brachel

Hanswilli von Brachel 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).

  • Water-insoluble monoazo pyridone dye
    Patent number: 4247456
    Abstract: Water-insoluble monoazo dyes of the formula ##STR1## produced by reacting a diazotized amine of the benzene, naphthalene, diphenyl, diphenylmethane or heterocyclic series which is free from water solubilizing groups with the appropriate 6-hydroxy-2-pyridone and the utility thereof for the dyeing and printing of synthetic fabric materials to yellow to red shades having excellent fastness to light and sublimation.
    Type: Grant
    Filed: November 19, 1976
    Date of Patent: January 27, 1981
    Assignee: Cassella Aktiengesellschaft
    Inventors: Hanswilli von Brachel, Ernst Heinrich, Otto Grawinger, Karl Hintermeier, Horst Kindler
  • Water-insoluble monoazo pyridine dyes
    Patent number: 3957749
    Abstract: Water-insoluble monoazo dyes of the formula ##SPC1##Produced by reacting a diazotized amine of the benzene, naphthalene, diphenyl, diphenylmethane or heterocyclic series which is free from water solubilizing groups with the appropriate 6-hydroxy-2-pyridone and the utility thereof for the dyeing and printing of synthetic fabric materials to yellow to red shades having excellent fastness to light and sublimation.
    Type: Grant
    Filed: June 5, 1972
    Date of Patent: May 18, 1976
    Assignee: Cassella Farbwerke Mainkur Aktiengesellschaft
    Inventors: Hanswilli von Brachel, Ernst Heinrich, Otto Grawinger, Karl Hintermeier, Horst Kindler