Patents Assigned to AGFA-Gevaert, N.R.
  • Filter dyes for rapid processing applications
    Patent number: 5344749
    Abstract: The synthesis and the application of new dyes is described, said new dyes being incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolorized in alkaline aqueous liquids used in the processing of said materials. The filter dyes have an amide function or a derivative therefrom as a substituent at the mono- or trimethine chain.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: September 6, 1994
    Assignee: AGFA-Gevaert, N.R.
    Inventors: Eric Kiekens, Paul Callant