Patents Represented by Attorney, Agent or Law Firm Norris McLaughin & Marcus
  • Process for preparing bis-alkoxy-triazinyl-amino-containing stilbene disulphonic acids or their derivatives
    Patent number: 6248887
    Abstract: Process for the preparation of stilbene-disulphonic acids containing bis-alkoxy-triazinyl-amino, or derivatives thereof, characterized in that stilbene-disulphonic acids containing bis-chlorotriazinyl-amino, or derivatives thereof, are reacted with at least 10 molar equivalents, based on the stilbene-disulphonic acid compound, of a C1-C4-monoalkanol.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: June 19, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Feldhues, Uwe Vogt, Udo Eckstein, Rolf Brockmann, Dietmar Fiedel