Patents by Inventor Steven J. Grammatica

Steven J. Grammatica 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: 4737429
    Abstract: An electrostatographic imaging member comprised of a supporting substrate; a hydrogenated amorphous silicon photogenerator layer; and in contact therewith a plasma deposited charge transporting layer with components therein selected from the group consisting of silicon nitrides, boron nitrides, aluminum nitrides, phosphorous nitrides, gallium nitrides, boron phosphides, aluminum phosphides, boron oxides, aluminum oxides, gallium oxides, and organosilanes; and wherein the transporting layer contains therein hydrogen, halides, or mixtures thereof.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: April 12, 1988
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Frank Jansen, Koji Okumura, Steven J. Grammatica, Michael A. Morgan
  • Patent number: 4634647
    Abstract: An electrophotographic photoresponsive device for use in electrophotography comprised of a supporting substrate, and an amorphous silicon composition containing from about 25 parts per million by weight to about 1 weight percent of boron compensated with from about 25 parts per million by weight to about 1 weight percent of phosphorous, nitrogen, or arsenic. Also disclosed is a photoresponsive electrophotographic device comprised of a supporting substrate, an uncompensated amorphous silicon layer and an amorphous silicon composition containing from about 100 parts per million by weight to about 1 weight percent of boron compensated with from about 25 parts per million by weight to about 1 weight percent of phosphorous, wherein the compensation increases from zero percent compensation to one percent compensation, for a distance of from about 0.
    Type: Grant
    Filed: January 29, 1985
    Date of Patent: January 6, 1987
    Assignee: Xerox Corporation
    Inventors: Frank Jansen, Joseph Mort, Michael A. Morgan, Steven J. Grammatica, John C. Knights
  • Patent number: 4613556
    Abstract: Disclosed is an electrographic imaging member consisting essentially of a supporting substrate, a hydrogenated amorphous silicon photogenerating layer, and in contact therewith a charge transporting layer of plasma deposited silicon oxide containing at least 50 atomic percent of oxygen.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: September 23, 1986
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Frank Jansen, Koji Okumura, Steven J. Grammatica, Michael A. Morgan
  • Patent number: 4544617
    Abstract: Disclosed is an electrophotographic photoresponsive device comprised of a supporting substrate, an amorphous silicon charge transport layer, a trapping layer comprised of doped amorphous silicon, and a top insulating overcoating layer.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: October 1, 1985
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Frank Jansen, Steven J. Grammatica, Michael A. Morgan
  • Patent number: 4314012
    Abstract: A reflex exposure imaging member including a transparent conductive support member and a photoconductive layer disposed on said support member and an optical screen disposed between the photoconductive layer and the support member wherein the photoconductive layer includes an N,N'-diphenyl, N,N'-substituted diphenylbenzidine compound and a pyrylium, thiapyrylium or selenapyrylium salt in an insulating binder, the photoconductive layer having a thickness of about 5 to about 20 microns and an optical density of from about 0.1 to about 0.8.
    Type: Grant
    Filed: August 27, 1980
    Date of Patent: February 2, 1982
    Assignee: Xerox Corporation
    Inventor: Steven J. Grammatica
  • Patent number: 3966466
    Abstract: An improved photoelectrophoretic imaging method is disclosed wherein a blocking layer is provided with a coating which interacts, in the dark, with the pigment particles of the imaging suspension so as to provide a uniformly charged imaging suspension upon exposure of the suspension to an electric field. The coating comprises a compound selected from the group consisting of inorganic salts of lithium, iodine, tin and iron.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: June 29, 1976
    Assignee: Xerox Corporation
    Inventors: Geoffrey A. Page, Steven J. Grammatica, Joan R. Ewing