Patents by Inventor Margarete Boos

Margarete Boos 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).

  • Mixtures of monoazo dyes containing halogen and cyano substituents
    Patent number: 4985043
    Abstract: Mixtures of monoazo dyes suitable for dyeing and printing hydrophobic fiber materials and mixtures thereof with natural fibers contain one or more dyes of the formula I ##STR1## and one or more dyes of the formula II ##STR2## in which Hal denotes bromo or chloro; R.sup.1 and R.sup.2, independently of one another, denote methyl or ethyl; R.sup.3, R.sup.4, R.sup.5 and R.sup.6, independently of one another, denote linear alkyl having 1 to 4 carbon atoms or alkenyl having 3 or 4 carbon atoms; and R denotes methyl, acetylamino, propionylamino, i-butyrylamino, or n-butyrylamino.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: January 15, 1991
    Assignee: Cassella Aktiengesellschaft
    Inventors: Ulrich Buhler, Manfred Hahnke, Reinhard Kuhn, Margarete Boos
  • Mixtures of monoazo dyestuffs
    Patent number: 4582509
    Abstract: The mixture of monoazo dyestuffs containing at least different individual dyestuffs of the formula ##STR1## wherein R.sup.1 is alkyl of 1 to 6 carbon atoms, cyclopentyl, cyclohexyl, fluoro, chloro, bromo, alkoxy of 1 to 4 carbon atoms or trifluoromethyl,R.sup.2 is alkyl of 1 to 3 carbon atoms andR.sup.3 and R.sup.4, independently of each other, are alkyl of 1 to 4 carbon atoms,is highly suitable for dyeing and printing hydrophobic materials.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: April 15, 1986
    Assignee: Cassella Aktiengesellschaft
    Inventors: Ulrich Buhler, Manfred Hahnke, Albert Bode, Kurt Roth, Margarete Boos