Patents by Inventor Jean E. Jones

Jean E. Jones 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).

  • Additives for contrast control in organic photoconductor compositions and elements
    Patent number: 4152152
    Abstract: Electrostatic contrast control in p-type electrophotographic elements is achieved by incorporating into the photoconductive layer a hole trapping agent such as a tetraphenylboron anion, bromide ion, iodide ion, oxidizable dye such as a carbocyanine and dicarbocyanine, merocarbocyanine and merodicarbocyanine, styryl, oxonol, hemioxonol, or hemicyanine. Usable hole trapping agents have an oxidation potential in a neutral solution of at least 0.1 volts less than that of the photoconductor in the photoconductive layer.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: May 1, 1979
    Assignee: Eastman Kodak Company
    Inventors: Lawrence E. Contois, Jean E. Jones
  • Cyclopropenone vesicular imaging composition, element and process
    Patent number: 4128422
    Abstract: A photographic vesicular imaging composition, element and process are provided using a binder having a suitable gas impermeability, a cyclopropenone vesiculating agent, and optionally a spectral sensitizing compound.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: December 5, 1978
    Assignee: Eastman Kodak Company
    Inventors: George L. Fletcher, Donald H. Wadsworth, Jean E. Jones