Patents by Inventor Mary A. Machonkin

Mary A. Machonkin 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: 5999780
    Abstract: Controllably conductive polymer compositions may be used in electrophotographic imaging developing systems, such as scavengeless or hybrid scavengeless systems or liquid image development systems. The conductive polymer compositions includes a charge-transporting material (particularly a charge-transporting, thiophene-containing polymer or an inert elastomeric polymer, such as a butadiene- or isoprene-based copolymer or an aromatic polyether-based polyurethane elastomer, that additionally comprises charge transport molecules) and a dopant capable of accepting electrons from the charge-transporting material. The invention also relates to an electrophotographic printing machine, a developing apparatus, and a coated transport member, an intermediate transfer belt, and a hybrid compliant photoreceptor comprising a composition of the invention.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: December 7, 1999
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Bing R. Hsieh, Mary A. Machonkin, Joseph Mammino, John F. Yanus
  • Patent number: 5834080
    Abstract: Controllably conductive polymer compositions may be used in electrophotographic imaging developing systems, such as scavengeless or hybrid scavengeless systems or liquid image development systems. The conductive polymer compositions includes a charge-transporting material (particularly a charge-transporting, thiophene-containing polymer or an inert elastomeric polymer, such as a butadiene- or isoprene-based copolymer or an aromatic polyether-based polyurethane elastomer, that additionally comprises charge transport molecules) and a dopant capable of accepting electrons from the charge-transporting material. The invention also relates to an electrophotographic printing machine, a developing apparatus, and a coated transport member, an intermediate transfer belt, and a hybrid compliant photoreceptor comprising a composition of the invention.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: November 10, 1998
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Bing R. Hsieh, Mary A. Machonkin, Joseph Mammino, John F. Yanus
  • Patent number: 5587224
    Abstract: A coated donor roll comprised of a core with a coating thereover comprised of a photolysis reaction product of a charge transporting polymer and a photo acid compound.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: December 24, 1996
    Assignee: Xerox Corporation
    Inventors: Bing R. Hsieh, Joseph Mort, Mary A. Machonkin, Joan R. Ewing
  • Patent number: 5204210
    Abstract: A method of forming a patterned, poly-crystalline diamond film on a substrate is disclosed. First, a photoresist layer is applied to a substrate. A diamond powder layer is formed on the photoresist layer either through spray-coating, dip-coating, spin-coating using a diamond-powder suspension, and the like. The photoresist layer is exposed to electromagnetic radiation through a mask either before or after the diamond powder layer is applied. Then, the photoresist layer is developed, after which the substrate is heated causing the photoresist layer to carbonize. The substrate is exposed to a mixture of hydrogen-containing and carbon-containing gases which are decomposed in a processing apparatus. Hydrogen in this gas mixture etches away at the carbonized photoresist layer leaving behind the patterned diamond powder layer. Carbon in these carbon-containing gases combines with the diamond particles in the diamond powder layer to form diamond structures on the substrate.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: April 20, 1993
    Assignee: Xerox Corporation
    Inventors: Frank Jansen, Mary A. Machonkin
  • Patent number: 5178980
    Abstract: An imaging member comprised of a supporting substrate, a photogenerator layer optionally dispersed in a resin binder, and a charge transport layer comprised of a fullerene or fullerenes optionally dispersed in a resin binder.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: January 12, 1993
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Mary A. Machonkin
  • Patent number: 5114477
    Abstract: An ink composition which comprises an aqueous or organic liquid vehicle, and as a colorant a fullerene, or a mixture of fullerenes.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: May 19, 1992
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Mary A. Machonkin
  • Patent number: 5099296
    Abstract: A thin film transistor in which a source electrode is electrically isolated from a drain electrode and a gate electrode. The gate electrode is formed on one surface of an electrically insulating layer. A semiconducting layer is formed on the other surface of the electrically insulating layer. The semiconducting layer has a charge carrier mobility of at least 1 cm.sup.2 /V-sec. and is made from a polycrystalline diamond layer. The source electrode and the drain electrode are formed on one surface of the polycrystalline diamond layer. The other surface of the polycrystalline diamond layer is in integral contact with the other surface of the electrically insulating layer.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: March 24, 1992
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Frank Jansen, Mary A. Machonkin, Koji Okumura
  • Patent number: 4925701
    Abstract: A process for the preparation of continuous polycrystalline diamond films which comprises applying to a substrate diamond powder in an amount of from about one particle per ten square microns to about 10 particles per square micron with an average particle diameter of from about 0.1 to about 0.4 micron; heating the resulting powdered substrate subsequent to incorporation in a processing apparatus; introducing a mixture of gases into the chamber, which gases provide a supply of carbon and hydrogen; and decomposing the gas mixture.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: May 15, 1990
    Assignee: Xerox Corporation
    Inventors: Frank Jansen, Mary A. Machonkin
  • Patent number: H1249
    Abstract: A process for minimizing or avoiding the corrosion of thermal ink jet heater components by the coating thereof with polycrystalline diamond.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: November 2, 1993
    Inventors: Mary A. Machonkin, Frank Jansen, Michael P. O'Horo