Patents by Inventor Engelbert Wiel

Engelbert Wiel 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 recording material
    Patent number: 6228568
    Abstract: The present invention relates to a color photographic recording material which contains, in at least one layer between the substrate and light-sensitive emulsion layer situated nearest to the substrate, a compound of formula (I) wherein X and Y, independently of each other in each case, represent an electron-attracting group, and X and Y together can form a group which is necessary for the completion of a 5- or 6-membered ring.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: May 8, 2001
    Assignee: Agfa-Gevaert
    Inventors: Thomas Stetzer, Hans Langen, Heinz Schütz, Hans-Joachim Schumann, Klaus Sinzger, Johannes Willsau, Dirk Hübner, Engelbert Wiel