Patents by Inventor James Ritter

James Ritter 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).

  • Publication number: 20110218099
    Abstract: In accordance with the present disclosure, a process for synthesis of a complex hydride material for hydrogen storage is provided. The process includes mixing a borohydride with at least one additive agent and at least one catalyst and heating the mixture at a temperature of less than about 600° C. and a pressure of H2 gas to form a complex hydride material. The complex hydride material comprises MAlxByHz, wherein M is an alkali metal or group IIA metal, Al is the element aluminum, x is any number from 0 to 1, B is the element boron, y is a number from 0 to 13, and z is a number from 4 to 57 with the additive agent and catalyst still being present. The complex hydride material is capable of cyclic dehydrogenation and rehydrogenation and has a hydrogen capacity of at least about 4 weight percent.
    Type: Application
    Filed: November 15, 2007
    Publication date: September 8, 2011
    Applicant: UNIVERSITY OF SOUTH CAROLINA
    Inventors: James A. Ritter, Tao Wang, Armin D. Ebner, Charles E. Holland
  • Publication number: 20090142258
    Abstract: In one embodiment of the present disclosure, a process for cyclic dehydrogenation and rehydrogenation of hydrogen storage materials is provided. The process includes liberating hydrogen from a hydrogen storage material comprising hydrogen atoms chemically bonded to one or more elements to form a dehydrogenated material and contacting the dehydrogenated material with a solvent in the presence of hydrogen gas such that the solvent forms a reversible complex with rehydrogenated product of the dehydrogenated material wherein the dehydrogenated material is rehydrogenated to form a solid material containing hydrogen atoms chemically bonded to one or more elements.
    Type: Application
    Filed: June 20, 2006
    Publication date: June 4, 2009
    Applicant: University of South Carolina
    Inventors: James A. Ritter, Armin D. Ebner, Jun Wang, Tao Wang, Charles E. Holland
  • Patent number: 7384574
    Abstract: A hydrogen storage material having improved hydrogen absorbtion and desorption kinetics is provided by adding graphite to a complex hydride such as a metal-doped alanate, i.e., NaAlH4. The incorporation of graphite into the complex hydride significantly enhances the rate of hydrogen absorbtion and desorption and lowers the desorption temperature needed to release stored hydrogen.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: June 10, 2008
    Assignees: Westinghouse Savannah River Co., University of South Carolina
    Inventors: Ragaiy Zidan, James A. Ritter, Armin D. Ebner, Jun Wang, Charles E. Holland
  • Publication number: 20070231393
    Abstract: Disclosed are methods of positioning a magnetic drug carrier particle within the body of a subject comprising placing an article within the body of the subject or external to the body of a subject; inserting a magnetic drug carrier particle into the body of the subject, and applying an external magnetic field to the article, thereby causing the magnetic drug carrier particle to be attracted to the article. Also disclosed are articles, systems, and kits that can be used in the disclosed methods.
    Type: Application
    Filed: May 19, 2005
    Publication date: October 4, 2007
    Applicant: UNIVERSITY OF SOUTH CAROLINA
    Inventors: James Ritter, Armin Ebner, Charles Holland
  • Patent number: 7270371
    Abstract: A vehicle slouch seat includes a cushion frame attached to a seat back frame such that the cushion frame is pivotable from an upright position to a slouch position. The slouch seat is also foldable and stowable against a vehicle cabin wall. Motion between the upright and the slouch positions is mediated by a guide hook attached to the back side of seat back frame.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: September 18, 2007
    Assignee: Lear Corporation
    Inventors: Vincent Adragna, Kyle Calvert, James Ritter, Eric Beaulieu, Kevin Gasparotto, Stephen Redwood
  • Publication number: 20070096497
    Abstract: A vehicle slouch seat includes a cushion frame attached to a seat back frame such that the cushion frame is pivotable from an upright position to a slouch position. The slouch seat is also foldable and stowable against a vehicle cabin wall. Motion between the upright and the slouch positions is mediated by a guide hook attached to the back side of seat back frame.
    Type: Application
    Filed: October 27, 2005
    Publication date: May 3, 2007
    Applicant: Lear Corporation
    Inventors: Vincent Adragna, Kyle Calvert, James Ritter, Eric Beaulieu, Kevin Gasparotto, Stephen Redwood
  • Patent number: 6879083
    Abstract: The coil end-turn segments of a generator exciter rotor are retained using an end-turn retention assembly that includes an inner band and an outer band. The inner band is located around at least a portion of each of the end-turn segments and has two ends. The outer peripheral surface of the inner band is tapered such that the thickness of the inner band varies between its ends. The outer band is located around the inner band and also has two ends. The inner peripheral surface of the outer band is tapered in a fashion that is reverse to that of the inner band outer surface, and such that the outer band thickness varies between its ends. By forming oppositely configured tapers in the inner and outer bands, the outer bands will remain in place and not migrate axially away from the lamination core during exciter rotor rotation.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: April 12, 2005
    Assignee: Honeywell International Inc.
    Inventors: Kieran Doherty, William M. Scherzinger, David E. Stout, Simon L. Waddell, Shannon W. Rogers, James Ritter, Shirley Pszczola, Henry Pszczola
  • Publication number: 20050032641
    Abstract: A hydrogen storage material having improved hydrogen absorbtion and desorption kinetics is provided by adding graphite to a complex hydride such as a metal-doped alanate, i.e., NaAlH4. The incorporation of graphite into the complex hydride significantly enhances the rate of hydrogen absorbtion and desorption and lowers the desorption temperature needed to release stored hydrogen.
    Type: Application
    Filed: July 19, 2004
    Publication date: February 10, 2005
    Inventors: Ragaiy Zidan, James Ritter, Armin Ebner, Jun Wang, Charles Holland
  • Publication number: 20050023928
    Abstract: The coil end-turn segments of a generator exciter rotor are retained using an end-turn retention assembly that includes an inner band and an outer band. The inner band is located around at least a portion of each of the end-turn segments and has two ends. The outer peripheral surface of the inner band is tapered such that the thickness of the inner band varies between its ends. The outer band is located around the inner band and also has two ends. The inner peripheral surface of the outer band is tapered in a fashion that is reverse to that of the inner band outer surface, and such that the outer band thickness varies between its ends. By forming oppositely configured tapers in the inner and outer bands, the outer bands will remain in place and not migrate axially away from the lamination core during exciter rotor rotation.
    Type: Application
    Filed: July 31, 2003
    Publication date: February 3, 2005
    Inventors: Kieran Doherty, William Scherzinger, David Stout, Simon Waddell, Shannon Rogers, James Ritter, Henry Pszczola, Shirley Pszczola
  • Patent number: 6623188
    Abstract: An optical data transmitter is described that includes a precoder that converts an input data signal to a binary precoded data signal and to a complementary binary precoded data signal. A delay element delays one of the complementary binary precoded data signal and the binary precoded data signal relative to the other by a time corresponding to less than one bit period of the binary precoded data signal. A differential amplifier converts the binary precoded data signal and the complementary binary precoded data signal to a four-level data signal and to a complementary four-level data signal. An optical data modulator modulates an amplitude of an optical signal applied to an optical input of the optical data modulator in response to at least one of the four-level data signal and the complementary four-level data signal to generate a modulated optical output signal.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: September 23, 2003
    Assignee: Optiuh Corporation
    Inventors: Timothy Eugene Dimmick, Heider Nalm Ereifej, Kenneth James Ritter
  • Patent number: 6407870
    Abstract: An optical system comprising a first array of individual beam shaping elements and a second array of beam shaping elements placed between a light source, e.g., a linear array of individual laser diodes and a reshaped beam receiver, e.g., an optical fiber cable. The inhomogeneous beams emitted from the laser diodes are passed in sequence through the first and second stages so that the first stage reshaped the cross section of the beam, e.g., in the fast-axis direction and the second stage reshapes the cross section of the beam, e.g., in the slow-axis direction. As a result, the output beams of the system may have a cross section reshaped to any desired configuration, e.g., suitable for inputting into the optical fiber cable and having divergences individually adjusted in mutually perpendicular directions.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: June 18, 2002
    Inventors: Ihar Hurevich, Dimitri Velikov, James Ritter, Andrey Shalapenok, Alexander Shkolnik
  • Patent number: 6250250
    Abstract: A multiple-cell plasma source consists of a pair of perforated plate-like cathodes and a perforated plate-like anode between the both cathode plates. Perforations in all three plates are coaxial and form a plurality of cells in which a Penning discharge plasma is generated due to the passage of axial components of the magnetic field through the individual cells. Since in all cells the plasma flow components are generated and work independently, there are no limitations for an increase in the surface area of the upper cathode plate, which has plasma emitting holes, so that the plasma source can treat objects of a large surface area. The plasma source of the invention has various means for controlling and adjusting the plasma pattern, distribution, parameters, and shape.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: June 26, 2001
    Inventors: Yuri Maishev, James Ritter, Leonid Velikov, Alexander Shkolnik
  • Patent number: 6246059
    Abstract: A cold-cathode type ion-beam source with a closed-loop ion-emitting slit and electrons drifting in crosses electric and magnetic fields is characterized by the absence of a metal anode which is replaced by a pair of positively charged bodies, such as concentric rings of a conductive material which are located inside a hollow housing of the ion source and are connected to a source of a positive potential. The ion-emitting slit is located between these rings in an upstream position in the direction of propagation of the ion beam. Replacement of a metallic anode with an anodic plasma, i.e., with a “virtual anode”, which is formed by a Penning-type discharge, descreases contamination of the ion beam by products of erosion of a metallic anode and increases the ion beam current, which results in more effective ionization of the workout gas.
    Type: Grant
    Filed: March 6, 1999
    Date of Patent: June 12, 2001
    Assignee: Advanced Ion Technology, Inc.
    Inventors: Yuri Maishev, James Ritter, Leonid Velikov, Alexander Shkolnik
  • Patent number: 6242749
    Abstract: The invention provides a multiple-cell ion-beam source in which magnetic poles of all adjacent cells have alternating polarities, i.e., the cells arranged in a single row from the center to the periphery of the cathode plate have polarities in the order of N-S-N-S-N . . . , etc. As a result, the direction of magnetic lines of forces in the aforementioned rows alternates, and therefore the magnetic flux is not accumulated towards the center. This means that the source of such a construction does not have dimensional limitations and ensures uniform distribution of the ion-beam current density over the entire surface of the object. Intensity of the magnetic field for each individual cell can be controlled individually. This allows adjustment in the distribution of the ion-beam current density over the surface of the object.
    Type: Grant
    Filed: January 30, 1999
    Date of Patent: June 5, 2001
    Inventors: Yuri Maishev, James Ritter, Leonid Velikov, Alexander Shkolnik
  • Patent number: 6238526
    Abstract: The invention provides a sputtering system which consists of an ion beam and a target of a sputterable material. A distinguishing feature of the system of the invention is that the sputtering target forms a guide channel for an ion beam and sputtered particles, so that a portion of the ions collides with the walls of the target inside a closed volume of the target and forms neutral sputterable particles impinging the object. The other part of the ions goes directly to the object and participates in an ion-assisted overcoating. Thus, the special form of the target improves efficiency of sputtering, prevents scattering and the loss of the sputterable material. The system can be realized in various embodiments. One of the embodiments provides a multiple-cell system in which each cell has an individual ion-emitting slit formed by the end of a cathode rod of one cathode plate and the opening in the second cathode plate.
    Type: Grant
    Filed: February 14, 1999
    Date of Patent: May 29, 2001
    Assignee: Advanced Ion Technology, Inc.
    Inventors: Yuri Maishev, James Ritter, Leonid Velikov, Alexander Shkolnik
  • Patent number: 6236163
    Abstract: A multiple-beam ion-beam assembly consisting of two or more concentrically arranged ring-shaped ion-beam sources having ion-beam slits that emit a plurality of ion beams which overlap on the surface being treated and thus ensure uniformity in distribution of ion currents on the treated surface. Since the ion-beam assembly consists of a plurality of individual source, uniform treatment can be performed on a large surface area. Several embodiments of the invention cover the systems with individual sources adjustable with respect to one another, with an oblique angle of incidence of beams emitted from individual source, and with combination of oblique angles and adjustable sources.
    Type: Grant
    Filed: October 18, 1999
    Date of Patent: May 22, 2001
    Inventors: Yuri Maishev, James Ritter, Yuri Terentiev, Leonid Velikov, Alexander Shkolnik
  • Patent number: 6214183
    Abstract: A combined ion-source and sputtering magnetron apparatus of the invention comprises a vacuum working chamber that contains a sputtering magnetron, an object to be treated fixed inside the housing of the chamber, and an ion-beam source installed within the working chamber between the object and the sputtering magnetron. In a preferred embodiment, the ion source is a cold-cathode ion source with a closed loop ion-emitting slit and drift of electrons in crossed electric and magnetic fields. The ion source emits the ion beam in the radial inward or outward direction onto the surface of the magnetron target at an oblique angle to the target surface. The bombardment of the target surface with the ion beam generates a large amount of sputtered particles. In addition, the ion bombardment forms a large amount of secondary electrons which are accelerated in the direction away from the target and are held in the crossed electric and magnetic fields of the magnetron target.
    Type: Grant
    Filed: January 30, 1999
    Date of Patent: April 10, 2001
    Assignee: Advanced Ion Technology, Inc.
    Inventors: Yuri Maishev, James Ritter, Leonid Velikov, Alexander Shkolnik
  • Patent number: 6153067
    Abstract: A method for combined treatment of an object simultaneously with an ion beam and a magnetron plasma consists in that an object, e.g., a semiconductor substrate, is treated with ions of a working gas emitted from an ion-beam source and with particles of a sputterable material directed toward the object in the same direction as the ion beam. The method is carried our by means of an apparatus that comprises a combination of a sputtering magnetron with an ion-beam source. According to several embodiments, the cathode of the ion source is separated into two parts electrically isolated from each other by a closed-loop ion-emitting slit and by isolation pads. The sputterable target is placed either onto the entire cathode or onto part thereof which is charged negatively with respect to another part which is grounded. During the operation of the apparatus, ion beam emitted from the ion source acts as a viral anode with respect to the magnetron target.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: November 28, 2000
    Assignee: Advanced Ion Technology, Inc.
    Inventors: Yuri Maishev, James Ritter, Leonid Velikov
  • Patent number: 6147354
    Abstract: A universal cold-cathode type ion source with closed-loop electron drifting and with ion-beam propagation direction perpendicular to the plane of electron drifting is intended for uniformly treating stationary or moveable objects. Treatment procedures include cleaning, activation, polishing, thin-film coating, or etching. The ion source of the invention allows for adjusting beam parameters and configurations and has an adjustable dimensions of the ionization space between the anode and the cathode. In a preferred embodiment, the adjustment is carried out by moving the anode with respect to the cathode. The moveable anode is shifted in the direction of propagation of the ion beam or in the opposite direction, whereby the tubular ion beam is either converged or diverged. As a result, it becomes possible to adjust the surface area being treated and characteristics of the ion beam such as average energy of ions in the beam and composition of the beam, in case of a multiple-component working medium.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: November 14, 2000
    Inventors: Yuri Maishev, James Ritter, Leonid Velikuv
  • Patent number: 6130507
    Abstract: The ion source of the invention emits ion beams radially inwardly or radially outwardly from the entire periphery of the closed-loop ion-emitting slit. In one embodiment, a tubular or oval-shaped hollow body, which also functions as a cathode, contains a similarly-shaped concentric anode spaced from the inner walls of the cathode at a distance required to form an ion-generating and accelerating space. The cathode has a continuous ion-emitting slit which is aligned with the position of the anode and is concentric thereto. A magnetic-field generation means is located inside the ring-shaped anode. When the ion source is energized by inducing an magnetic field, connecting the anode to a positive pole of the electric power supply unit, the cathode to a negative pole of the power supply unit, and supplying a working medium into the hollow housing, the electrons begin to drift in the annular space between the anode and cathode in the same direction in which the ions are emitted from the annular slit.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: October 10, 2000
    Assignee: Advanced Ion Technology, Inc
    Inventors: Yuri Maishev, James Ritter, Yuri Terentiev, Leonid Velikov