Patents by Inventor Heinz Krueger

Heinz Krueger 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).

  • Method for producing an aqueous hydroxylamine solution devoid of salt
    Patent number: 7029557
    Abstract: The invention relates to a method for producing a highly pure, aqueous hydroxylamine solution by distilling an aqueous solution, devoid of salt, of a hydroxyl ammonium salt in a plate column comprising at least two mechanical plates. Said method is characterised in that packing bodies are arranged between at least two plates of the plate column over the cross-section of said column.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: April 18, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl-Heinz Wostbrock, Joachim Thiel, Heinz Krüger, Eckhard Ströfer, Markus Weber, Bernd Gerber, Bernd Rumpf, Bernd Sachweh, Steffen Kerth
  • Method for the production of a salt-free aqueous hydroxylamine solution
    Patent number: 6942762
    Abstract: A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tray of the tray column over the cross section of the column.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: September 13, 2005
    Assignee: BASF Akteingesellschaft
    Inventors: Karl-Heinz Wostbrock, Joachim Thiel, Heinz Krüger, Eckhard Ströfer, Markus Weber, Bernd Gerber, Bernd Rumpf, Bernd Sachweh, Steffen Kerth
  • Azo dyes of methylaniline disulfonic acid coupled with naphthylamine sulfonic acid
    Patent number: 4798887
    Abstract: Novel compounds which, in the form of the free acid, are of the formula 1 ##STR1## where X is chlorine or fluorine and R is hydrogen, vinylsulfonylphenyl, .beta.-sulfatoethylsulfonylphenyl, vinylsulfonylbenzyl, sulfophenyl or .beta.-sulfatoethylsulfonylbenzyl, are particularly suitable for dyeing cotton.
    Type: Grant
    Filed: April 29, 1986
    Date of Patent: January 17, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Krueger, Hartmut Lardon, Manfred Patsch
  • Reactive dyes containing substituted 4-fluoropyridaz-6-one radicals
    Patent number: 4677199
    Abstract: Compounds of the general formula I ##STR1## wherein R.sup.1 is hydrogen, fluorine, chlorine or bromine, R.sup.2 is hydrogen, fluorine, chlorine, bromine, or nitro, B is aliphatic or a sulfo-substituted phenylene radical, and X is a dye radical, are useful for dyeing hydroxyl-containing textile material, in particular cotton.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: June 30, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Dietmar Augart, Heinz Eilingsfeld, Heinz Krueger, Hartmut Lardon, Ortwin Schaffer, Guenther Seybold