Patents by Inventor Spencer M. Krueger

Spencer M. Krueger 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).

  • Photographic materials containing yellow filter dyes
    Patent number: 4420555
    Abstract: Light sensitive layers in photographic elements are protected against exposure to radiation in the blue region of the visible spectrum by a yellow filter dye having the structure: ##STR1## where: R.sup.1 is alkyl of 1 to 3 carbon atoms;R.sup.2 is hydrogen or alkyl of 1 to 3 carbon atoms;R.sup.3 and R.sup.4 are each individually alkyl of 1 to 3 carbon atoms, at least one of which is terminated with ##STR2## and R.sup.5 is alkyl of 1 to 3 carbon atoms or fluoroalkyl of 1 to 3 carbon atoms.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: December 13, 1983
    Assignee: Eastman Kodak Company
    Inventors: Spencer M. Krueger, James W. Brown, III