Patents Assigned to DFI Chem GmbH
  • Black trisazo dyes, their preparation and their use
    Patent number: 10259942
    Abstract: The present invention provides trisazo dyes of formula (V), wherein A, M and R1, R2, R3, R4 are as defined in the specification, processes for their preparation, recording liquids and liquid dye preparations containing them and their use in inks as well as processes for applying them and printed articles comprising them.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: April 16, 2019
    Assignee: DFI Chem GmbH
    Inventors: Kurt Baettig, Damien Moigno