Patents by Inventor Jurgen Dornhagen

Jurgen Dornhagen 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).

  • Reactive azo dyes with a coupler of the aminonaphthalene series
    Patent number: 5789557
    Abstract: Reactive dyes of the formula ##STR1## where n is 1 or 2,R.sup.1 is hydrogen or hydroxysulfonyl,R.sup.2 is hydrogen or hydroxyl,R.sup.3 is substituted C.sub.1 -C.sub.4 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl or substituted phenyl,R.sup.4 is hydrogen or R.sup.3 and R.sup.4, together with the nitrogen atom linking them, form a heterocyclic radical andD is a radical of a diazo or tetrazo component, each having at least one mechanism,their use for dyeing or printing hydroxyl-containing or nitrogen-containing organic substrates, and novel aminonaphthalenes.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: August 4, 1998
    Assignee: Basf Aktiengesellschaft
    Inventors: Jurgen Dornhagen, Heike Kilburg, Manfred Patsch, Hermann Loffler, Ortwin Schaffer
  • Cephalosporins derivatives
    Patent number: 4988685
    Abstract: Novel cephalosporins of the formula ##STR1## in which R.sup.1 represents hydrogen or an amino-protecting groupandR.sup.2 represents alkyl, cycloalkyl or alkenyl.
    Type: Grant
    Filed: January 11, 1990
    Date of Patent: January 29, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Dornhagen, Rolf Angerbauer, Karl G. Metzger, Hans-Joachim Zeiler