Patents by Inventor Robert C. Speiser

Robert C. Speiser 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).

  • Patent number: 4770965
    Abstract: An electrophotographic imaging member comprising providing a conductive substrate, an alloy layer comprising selenium doped with arsenic having a thickness of between about 100 micrometers and about 400 micrometers, the alloy layer comprising between about 0.3 percent and about 2 percent by weight arsenic at the surface of the alloy layer facing away from the conductive substrate and comprising crystalline selenium having a thickness of from about 0.01 micrometer to about 1 micrometer contiguous to the conductive substrate, and a thin protective overcoating layer on the alloy layer, the overcoating layer having a thickness between about 0.05 micrometer and about 0.3 micrometer and comprising from about 0.5 percent to about 3 percent by weight nigrosine. This photoreceptor is prepared by providing a conductive substrate, cleaning the substrate, heating an alloy comprising selenium and from about 0.
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: September 13, 1988
    Assignee: Xerox Corporation
    Inventors: William D. Fender, Robert C. Speiser, Gerhard K. Kramer, Hans P. Ceelen
  • Patent number: 4134137
    Abstract: A single wire microelectrometer imaging system is disclosed wherein a latent electrostatic image charge pattern is produced, then measured from point to point across the charged image surface and then transmitted for processing if desired. It is found that this system provides multiple image information from a single exposure which is especially significant in xeroradiographic medical diagnostic imaging processes. Thus instead of developing a latent electrostatic image which is produced the charge is captured and transmitted, to be stored or further processed if desired. The captured image may be shown in either hard copy form or on a video screen as desired.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: January 9, 1979
    Assignee: Xerox Corporation
    Inventors: Paul F. Jacobs, Thomas L. Thourson, Robert C. Speiser