Patents by Inventor Hartmut Lardon

Hartmut Lardon 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).

  • 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
  • Preparation of sulfides
    Patent number: 4438282
    Abstract: Sulfides prepared by reacting a sulfoxide with a hydrazine or hydroxylamine derivative or a quaternary salt thereof are useful starting materials for the preparation of drugs, pesticides and dyes.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Hartmut Lardon, Guenther Seybold