Patents by Inventor Bernd Dill

Bernd Dill 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: 4964876
    Abstract: The dye mixture mentioned in claim 1 or one of the dyes mentioned in claims 12 or 13 are used for the dyeing of polyester textile material.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: October 23, 1990
    Assignee: Ciba-Geigy Corporation
    Inventors: Christian Frey, Bernd Dill, Konrad Schmid
  • Patent number: 4825005
    Abstract: The invention relates to a novel process for the preparation of ether and thioether compounds of formula ##STR1## by reacting compounds of formula ##STR2## with compounds of formulaR.sub.1 --Ywherein R, R.sub.1, X, Y and n are as defined in claim 1, in the presence of an acid acceptor and in an aliphatic ketone, which process is carried out under pressure in the temperature range from 115.degree. to 200.degree. C.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: April 25, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Christian Frey, Bernd Dill
  • Patent number: 4767573
    Abstract: A process for the preparation of a mixture of 1-amino-2-chloro-4-hydroxyanthraquinone and 1-amino-2-bromo-4-hydroxyanthraquinone, which mixture contains a high proportion of 1-amino-2-chloro-4-hydroxyanthraquinone, by chlorinating and brominating 1-aminoanthraquinone and reacting the intermediate so obtained with concentrated or fuming sulfuric acid.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: August 30, 1988
    Assignee: Ciba-Geigy Corporation
    Inventors: Rolf Muller, Bernd Dill
  • Patent number: 4659831
    Abstract: The invention relates to a process for the preparation of anthraquinone imides by condensing vattable anthraquinone compounds which contain at least one primary amino group with aromatic halogen compounds, in an organic solvent and at elevated temperature in the presence of a base and a copper catalyst. The process comprises first carrying out the condensation until a reaction of 60-95% has taken place, and then subjecting the reaction mixture, without isolating the reaction product, to an aftertreatment at a temperature which is 5.degree. to 60.degree. C. above the initial temperature of the condensation. This process permits the anthraquinone imides to be obtained in increased yield and additionally provides products with improved qualities. The intermediates so obtained can be further processed to vat dyes.
    Type: Grant
    Filed: October 2, 1984
    Date of Patent: April 21, 1987
    Assignee: Ciba-Geigy AG
    Inventor: Bernd Dill