Patents by Inventor Robert J. Rumery

Robert J. Rumery 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).

  • Electrophotographic photoconductor having improved cycling stability and oil resistance
    Patent number: 5545499
    Abstract: A photoconductor for use in electrophotographic reproduction devices is disclosed. This photoconductor exhibits improved oil resistance when used with liquid toners and excellent cycling stability. The photoconductors of the present invention utilize a phthalocyanine dye, particularly an X-form metal-free phthalocyanine, dispersed in a medium molecular weight polyvinyl chloride binder in the charge generating layer, and a charge transport molecule, particularly a hydrazone such as DEH, in a polyestercarbonate binder in the charge transport layer.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: August 13, 1996
    Assignee: Lexmark International, Inc.
    Inventors: Vernon M. Balthis, Ronald A. Merten, Robert J. Rumery, Robert L. Vollmer