Patents Examined by Richard L. Schitting
  • Heat development process and color photographic recording material suitable for this process
    Patent number: 4740446
    Abstract: Compounds corresponding to formula I are suitable for use as thermal development and diffusion promoting agents for the heat development process. The said compounds enable higher color transfer densities to be obtained and/or the development time to be reduced. ##STR1## wherein R.sup.1, R.sup.2 denote alkyl, cycloalkyl, aralkyl, aryl or acyl andZ denotes a group for completing a saturated heterocyclic ring containing 5 to 11 ring members.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: April 26, 1988
    Assignee: Agfa Gevaert Aktiengesellschaft
    Inventors: Karl-Wilhelm Schranz, Gunther Schenk