Patents by Inventor Thomas H ubsch

Thomas H ubsch 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).

  • Color photographic silver halide material
    Patent number: 5601968
    Abstract: A color photographic silver halide material with a support and at least one silver halide emulsion layer applied thereto which contains at least one 2-equivalent pyrazolone magenta coupler of the formula (I) ##STR1## with the substituents having the meanings stated in the specification and at least one amine which contains repeat units of the formulae (II) or (III) ##STR2## with the substituents having the meanings stated in the specification, is distinguished by reduced fogging and color spotting during storage.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: February 11, 1997
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Beate Weber, Hans Langen, Uwe Dahlhaus, Thomas H ubsch