Patents by Inventor Siegel Bernd

Siegel Bernd 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).

  • Doubled reactive dyes
    Patent number: 5175262
    Abstract: Reactive dyes of the formula ##STR1## where R.sup.1 is hydrogen, methyl or ethyl,X is hydrogen or hydroxysulfonyl,Hal is fluorine or chlorine,D is phenylene, carboxyl- or hydroxysulfonyl-monosubstituted or -disubstituted phenylene or hydroxysulfonyl-monosubstituted or -disubstituted naphthylene,A is a fiber-reactive radical, or A--D combined is a benzo-fused fiber-reactive radical, andZ is a bridge member, are useful for dyeing or printing hydroxyl- or nitrogen-containing substrates.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: December 29, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Hermann Loeffler, Klaus Pandl, Manfred Patsch, Siegel Bernd