Patents by Inventor D. Allred

D. Allred 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: 4715890
    Abstract: A method of forming a magnetic material. The magnetic material is a solid mass of grains, and has magnetic parameters characterized by: (1) a maximum magnetic energy product, (BH).sub.max, greater than 15 megagaussoersteds; and (2) a remanence greater than 8 kilogauss. The magnetic material is prepared by a two step solidification, heat treatment process. The solidification process is carried out by: (a) forming a solution of reducible precursor compounds of the magnetic material; and (b) thereafter reducing the reducible, precursor compounds and forming a precipitate thereof. The precipitate has a morphology characterized as being one or more of (i) amorphous, (ii) microcrystalline, or (iii) polycrystalline. The grains within the precipitate have, at this stage of the process, an average grain characteristic dimension less than that of the heat treated magnetic material.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: December 29, 1987
    Assignee: Ovonic Synthetic Materials Company, Inc.
    Inventors: Stanford R. Ovshinsky, Stephen J. Hudgens, David D. Allred, Gregory Demaggio
  • Patent number: 4701343
    Abstract: An improved method of depositing thin films onto a substrate with microwave energy by operating at substantially the minimum of the pressure-power curve for the particular geometry of reaction vessel and composition of reaction gases being utilized.
    Type: Grant
    Filed: August 13, 1986
    Date of Patent: October 20, 1987
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, David D. Allred, Lee Walter, Stephen J. Hudgens
  • Patent number: 4664937
    Abstract: A method of depositing a semiconductor alloy film onto a substrate by activating at least one group of free radicals and incorporating desired ones of the activated group into the film.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: May 12, 1987
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, David D. Allred, Lee Walter, Stephen J. Hudgens
  • Patent number: 4663776
    Abstract: A system for accessing a plurality of telephone wires which are two-wire, four-wire and six-wire circuits, including a common access test bus, a common control bus, a plurality of access shelves for connecting the circuits to the common access test bus, in which each access shelf is individually selectively controllable to connect the circuits to the common access test bus in response to control signals on the common control bus, and a test controller having a programmable data processor for selectively generating the control signals to individually control any one of the access shelves.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: May 5, 1987
    Assignee: Wiltron Company
    Inventors: Ruben Wever, Lorin D. Allred, Marco A. Ruiz
  • Patent number: 4615905
    Abstract: A method of depositing a semiconductor alloy film onto a substrate by activating groups of free radicals and incorporating desired ones of the activated groups into the film.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: October 7, 1986
    Assignee: Sovonics Solar Systems, Inc.
    Inventors: Stanford R. Ovshinsky, David D. Allred, Lee Walter, Stephen J. Hudgens
  • Patent number: 4607608
    Abstract: A campfire griddle or grill which is designed for convenience and cooking over a campfire. A metal support in the form of a stake is driven into the ground by stepping on a foot pad and the griddle handle is then placed over the stake and lowered to the desired height. The handle can be adjusted to different heights by depressing the safety latch while lowering and the griddle can be swung away from the fire as desired. The griddle itself can easily be attached or removed from the handle. It can also be used alone on a camp stove if desired. A charcoal pan can also be attached to the stake under the griddle so that charcoal can be placed in such charcoal pan to heat the griddle or grill after it has been placed on the supporting stand.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: August 26, 1986
    Inventors: Von D. Allred, Mark Allred
  • Patent number: 4576400
    Abstract: A repair assembly for broken or leaking risers in underground irrigation systems is provided. The repair assembly is adapted to be inserted into a hole through the wall of a buried water distribution line and is held in place by locking tangs engaging the interior surface of the distribution line and by a locking ring flange disposed about the exterior of the assembly and bearing on the exterior wall of the distribution line.
    Type: Grant
    Filed: February 10, 1984
    Date of Patent: March 18, 1986
    Inventors: Von D. Allred, Don B. Harmon
  • Patent number: 4525605
    Abstract: A system for accessing a plurality of telephone wires which are two-wire, four-wire and six-wire circuits, including a common access test bus, a common control bus, a plurality of access shelves for connecting the circuits to the common access test bus, in which each access shelf is individually selectively controllable to connect the circuits to the common access test bus in response to control signals on the common control bus, and a test controller having a programmable data processor for selectively generating the control signals to individually control any one of the access shelves.
    Type: Grant
    Filed: December 8, 1982
    Date of Patent: June 25, 1985
    Assignee: Wiltron Company
    Inventors: Ruben Wever, Lorin D. Allred, Marco A. Ruiz
  • Patent number: 4517223
    Abstract: A process for making amorphous semiconductor alloy films and devices at high deposition rates utilizes microwave energy to form a deposition plasma. The alloys exhibit high quality electronic properties suitable for many applications including photovoltaic applications.The process includes the steps of providing a source of microwave energy, coupling the microwave energy into a substantially enclosed reaction vessel containing the substrate onto which the amorphous semiconductor film is to be deposited, and introducing into the vessel reaction gases including at least one semiconductor containing compound. The microwave energy and the reaction gases form a glow discharge plasma within the vessel to deposit an amorphous semiconductor film from the reaction gases onto the substrate. The reactions gases can include silane (SiH.sub.4), silicon tetrafluoride (SiF.sub.4), silane and silicon tetrafluoride, silane and germane (GeH.sub.4), and silicon tetrafluoride and germane.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: May 14, 1985
    Assignee: Sovonics Solar Systems
    Inventors: Stanford R. Ovshinsky, David D. Allred, Lee Walter, Stephen J. Hudgens
  • Patent number: 4504518
    Abstract: A low pressure process for making amorphous semiconductor alloy films and devices at high deposition rates and high gas conversion efficiencies utilizes microwave energy to form a deposition plasma. The alloys exhibit high-quality electronic properties suitable for many applications including photovoltaic and electrophotographic applications.The process includes the steps of providing a source of microwave energy, coupling the microwave energy into a substantially enclosed reaction vessel containing the substrate onto which the amorphous semiconductor film is to be deposited, introducing into the vessel at least one reaction gas and evacuating the vessel to a low enough deposition pressure to deposit the film at high deposition rates with high reaction gas conversion efficiencies without any significant powder or polymeric inclusions. The microwave energy and the reaction gases form a glow discharge plasma within the vessel to deposit an amorphous semiconductor film from the reaction gases onto the substrate.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: March 12, 1985
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, David D. Allred, Lee Walter, Stephen J. Hudgens
  • Patent number: 4435445
    Abstract: A process and apparatus for depositing a film from a gas involves introducing the gas to a deposition environment containing a substrate, heating the substrate, and irradiating the gas with radiation having a preselected energy spectrum, such that a film is deposited onto the substrate. In a preferred embodiment, the energy spectrum of the radiation is below or approximately equal to that required to photochemically decompose the gas. In another embodiment, the gas is irradiated through a transparent member exposed at a first surface thereof to the deposition environment, and a flow of substantially inert gaseous material is passed along the first surface to minimize deposition thereon.
    Type: Grant
    Filed: May 13, 1982
    Date of Patent: March 6, 1984
    Assignee: Energy Conversion Devices, Inc.
    Inventors: David D. Allred, Lee Walter, Jaime M. Reyes, Stanford R. Ovshinsky
  • Patent number: 4419533
    Abstract: There is disclosed new and improved photovoltaic devices which provide increased short circuit currents and efficiencies over that previously obtainable from prior devices. The disclosed devices include incident radiation directing means for directing at least a portion of the incident light through the active region or regions thereof at angles sufficient to substantially confine the directed radiation in the devices. This allows substantially total utilization of photogenerated electron-hole pairs. Further, because the light is directed through the active region or regions at such angles, the active regions can be made thinner to also increase collection efficiencies.The incident radiation directors can be random surface or bulk reflectors to provide random scattering of the light, or periodic surface or bulk reflector to provide selective scattering of the light.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: December 6, 1983
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Wolodymyr Czubatyj, Rajendra Singh, Joachim Doehler, David D. Allred, Jaime M. Reyes
  • Patent number: 4243511
    Abstract: Oil shale containing relatively large quantities of alkaline carbonate minerals is retorted utilizing superheated water vapor at temperatures of from about 425.degree. C. to about 510.degree. C. Retorting with a sufficient carbon dioxide partial pressure effectively suppresses decomposition of the alkaline carbonates to obtain an environmentally acceptable retorted shale.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: January 6, 1981
    Assignee: Marathon Oil Company
    Inventor: Victor D. Allred
  • Patent number: 3960702
    Abstract: Oil shale is retorted using vapor phase water at about 850.degree.-950.degree.F, at a superficial gas velocity of about 20 feet per minute and at a pressure in the range of from about 1 to about 150 p.s.i.a.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: June 1, 1976
    Assignee: Marathon Oil Company
    Inventor: Victor D. Allred