Patents by Inventor Joseph Lindmayer

Joseph Lindmayer 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: 4880475
    Abstract: Disclosed are optically transmissive conductors, particulary resistive electrodes for optical devices such as electroluminescent lamps and displays, comprising a thin layer of indium tin oxide (ITO) stabilized by a layer of a metal oxide, such as palladium oxide or nickel oxide. In the disclosed method, a thin layer of conductive ITO is coated with a metal layer and then oxidized by heating in air to 500.degree. C.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: November 14, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4879186
    Abstract: Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants and a fusible salt. The base material is an alkaline earth metal sulfide such as calcium sulfide. Lithium fluoride is used to enhance the interdiffusion of materials. Samarium and a europium compound are used as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. The material is then placed in a transparent binder and applied to a substrate, or deposited as a thin film directly on a substrate for different uses.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: November 7, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4864536
    Abstract: An optical memory system and associated method uses electron trapping materials. Data may be written into an optical memory made of the electron trapping material by application of a visible light source to the material. The visible light source causes electrons to be trapped in the material, which electrons will be released and emit visible light upon application of a read beam infrared source to the material. An arrangement realizes logical functions by parallel memories each memory having stripes of memory material disposed upon a plastic substrate.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: September 5, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4855603
    Abstract: Photoluminescent materials for radiography are prepared using a base material, first and second dopants and a fusible salt. The base material is an alkaline earth metal sulfide such as strontium sulfide. Lithium fluoride is used to enhance the interdiffusion of materials. Samarium and cerium sulfide are used as the first and second dopants. Improved performance may be achieved by adding barium sulfate and/or cesium iodide. The photoluminescent material is made according to a process involving heating of the material to a fusing temperatue, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. When cesium iodide is added it is mixed in after the grinding step. The material is then placed in a transparent binder and applied to a substrate, or deposited as a thin film directly on a substrate for different uses.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: August 8, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4842960
    Abstract: Photoluminescent materials useful for photonic applications are prepared using a dual base material, first, second and third dopants, and a fusable salt. The base materials are alkaline earth metal sulfides, such as strontium and cerium sulfides. Lithium fluoride is used to enhance the interdiffusion of materials. Samarium, europium and cerium are used together for dopants in providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature. The material is then either ground to particles or is deposited as a thin film for different uses.
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: June 27, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4839092
    Abstract: Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants, barium sulfate and a fusable salt. The base material is an alkaline earth metal sulfide or selenide such as strontium sulfide. Barium sulfate is used to increase the brightness of output light, whereas lithium fluoride is used to allow the material to be fused together. Samarium and europium oxide are used as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. The material is then placed in a transparent binder and applied to a substrate.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: June 13, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4830875
    Abstract: Photoluminescent materials useful for detection of infrared light are constructed using a base material of strontium sulfide. Barium sulfate is used to increase brightness of output light of the materials, whereas lithium floride is used to allow the material to be fused together. Samarium and either cerium oxide or europium oxide are used in specific examples for providing electron traps in the photoluminescent material. An infrared sensing device or card may be constructed using the material. The photoluminescent material is made according to a process involving heating of the material to a fusing point, grinding the material after cooling, and reheating the material to below the fusing temperature. The material is then placed in a transparent binder and applied to a substrate. An alternate process involves applying the components of the photoluminescent material to a substrate of aluminum oxide and fusing the components onto the substrate.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: May 16, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4822520
    Abstract: Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants, barium sulfate and a fusable salt. The base material is an alkaline earth metal sulfide or selenide such as strontium sulfide. Barium sulfate is used to increase the brightness of output light, whereas lithium fluoride is used to allow the material to be fused together. Samarium and cerium oxide are used in specific examples as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. The material is then placed in a transparent binder and applied to a substrate.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: April 18, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4818434
    Abstract: Materials having thermoluminescent properties use a base material and two dopants and made from a process of mixing the parts together, heating the mixture to fuse together, grinding the mass into a fine powder, and reheating the powder. The resultant powder may be combined with a vehicle to form a paint. A fusible salt may be used in making the thermoluminescent material. The dopants may be Eu.sub.2, O.sub.3, Sm, Ce O.sub.2, and/or La O.
    Type: Grant
    Filed: April 6, 1988
    Date of Patent: April 4, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4812659
    Abstract: Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants, barium sulfate and a fusable salt. The base material is an alkaline earth metal sulfide or selenide such as strontium sulfide. Barium sulfate is used to increase the brightness of output light, whereas lithium fluoride is used to allow the material to be fused together. Samarium and cerium oxide are used as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. An infrared sensing device or card may be constructed by placing the material in a transparent binder and applying it to a substrate. The material and its substrate may then by encapsulated.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: March 14, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4812660
    Abstract: Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants and a fusible salt. The base material is an alkaline earth metal sulfide such as calcium sulfide. Lithium fluoride is used to enhance the interdiffusion of materials. Samarium and cerium sulfide are used as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. The material is then placed in a transparent binder and applied to a substrate, or deposited as a thin film directly on a substrate for different uses.
    Type: Grant
    Filed: August 14, 1987
    Date of Patent: March 14, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4806772
    Abstract: Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants, barium sulfate and a fusable salt. The base material is an alkaline earth metal sulfide or selenide such as strontium sulfide. Barium sulfate is used to increase the brightness of output light, whereas lithium fluoride is used to allow the material to be fused together. Samarium and europium oxide are used as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. An infrared sensing device or card is constructed by placing the material in a transparent binder and applying it to a substrate. The material and substrate may then by encapsulated.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: February 21, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4755324
    Abstract: Materials having thermoluminescent properties use a base material and two dopants and made from a process of mixing the parts together, heating the mixture to fuse together, grinding the mass into a fine powder, and reheating the powder. The resultant powder may be combined with a vehicle to form a paint. A fusible salt may be used in making the thermoluminescent material. The dopants may be Eu.sub.2 O.sub.3, Sm, Ce O.sub.2, and/or La.sub.2 O.sub.3.
    Type: Grant
    Filed: November 15, 1985
    Date of Patent: July 5, 1988
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4748375
    Abstract: Disclosed are optically transmissive conductors, particularly resistive electrodes for optical devices such as electroluminescent lamps and displays, comprising a thin layer of indium tin oxide (ITO) stabilized by a layer of a metal oxide, such as palladium oxide or nickel oxide. In the disclosed method, a thin layer of conductive ITO is coated with a metal layer and then oxidized by heating in air to 500.degree. C.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: May 31, 1988
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4705952
    Abstract: An infrared communications device includes a novel infrared-triggered phosphor which stores energy in the form of visible light of a first wavelength and releases energy in the form of visible light of a second wavelength when triggered by infrared light. Modulated infrared input signals produce modulated visible light output signals which are supplied through a photomultiplier to amplification and demodulation circuitry. The phosphor is a composition comprising an alkaline earth metal sulfide, rare earth dopants, and a fusible salt.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: November 10, 1987
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4693906
    Abstract: Disclosed are electroluminescent devices employing a stabilized tantalum sub-oxide as a dielectric. The tantalum sub-oxide is a non-stoichiometric oxide of the general form Ta.sub.2 O.sub.m, where 4.5<m<5.0, stabilized by bonds with suitable anions such as OH. In a disclosed method, a layer of tantalum sub-oxide is deposited to a thickness of from 3000 to 4000 angstroms. More particularly, a source mixture of tantalum metal and tantalum pentoxide is provided, vaporized by electron beam evaporation, and allowed to condense on a surface. The layer of tantalum sub-oxide is exposed to anions for completing a stable oxide network. Preferably, the anions are OH radicals, and the bonds are formed by exposing the layer to a humid atmosphere. The thus-stabilized layer is reheated to remove any water.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: September 15, 1987
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4492812
    Abstract: Electrically conductive contacts containing solderable metals, including tin, silver, copper and nickel, with aluminum are formed on the front and/or back surfaces of a solar cell. They are deposited by spraying the metals onto the cell surfaces, together or as layers, with an aluminum-containing layer in direct contact with the cell surfaces.
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: January 8, 1985
    Assignee: Solarex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4431599
    Abstract: A method and apparatus for the continuous melting of silicon for use in semiconductor devices, the method tending to reduce the time and expense associated with conventional melting and forming. The method for melting silicon comprises charging silicon into a melting vessel having a drain therein, heating the silicon in the vessel to a temperature above the melting point of silicon, and allowing the molten silicon to pass through the drain out of the vessel.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: February 14, 1984
    Assignee: Semix Incorporated
    Inventor: Joseph Lindmayer
  • Patent number: 4392010
    Abstract: Electrically conductive contacts containing zinc or other solderable metals, and aluminum are formed on the front and/or back surfaces of a solar cell. They are deposited by spraying the metals onto the cell surfaces, together or as layers, with the aluminum-containing layer in direct contact with the cell surfaces.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: July 5, 1983
    Assignee: Solarex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4349691
    Abstract: A method of making a silicon solar energy cell having a substantially constant voltage despite significant increases in illumination, in which the back surface junction of the cell is formed by aluminum alloying at relatively low temperatures.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: September 14, 1982
    Assignee: Solarex Corporation
    Inventor: Joseph Lindmayer