Patents by Inventor Venkatesan Manivannan

Venkatesan Manivannan 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: 7128849
    Abstract: A phosphor comprises: (a) at least a first metal selected from the group consisting of yttrium and elements of lanthanide series other than europium; (b) at least a second metal selected from the group consisting of aluminum, gallium, indium, and scandium; (c) boron; and (d) europium. The phosphor is used in light source that comprises a UV radiation source to convert UV radiation to visible light.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: October 31, 2006
    Assignee: General Electric Company
    Inventors: Anant Achyut Setlur, Alok Mani Srivastava, Holly Ann Comanzo, Venkatesan Manivannan
  • Patent number: 7122128
    Abstract: A phosphor comprises a borate of terbium, at least an alkaline-earth metal, and at least a Group-3 metal. In one embodiment, the phosphor has a formula of A3(D1-xTbx)3(BO3)5; wherein A is at least an alkaline-earth metal selected from the group consisting of calcium, barium, strontium, and magnesium; D is at least a Group-3 metal selected from the group consisting of lanthanum, scandium, and yttrium; and 0<x<0.5. The phosphor can be used in light sources such as those based on mercury discharge or light-emitting diodes and in displays.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: October 17, 2006
    Assignee: General Electric Company
    Inventors: Holly Ann Comanzo, Venkatesan Manivannan, Alok Mani Srivastava, William Winder Beers
  • Patent number: 7119488
    Abstract: A fluorescent lamp including a phosphor layer comprising a phosphor blend including four or more optimized phosphors emitting within a specific spectral range to optimize luminosity for a given color rendering index (CRI) and color coordinated temperature (CCT). The blend will include at least four phosphors selected from the following: a blue phosphor having an emission peak at 440–490 nm, a blue-green phosphor having an emission peak at 475–525 nm, a green phosphor having an emission peak at 515–550 nm, an orange phosphor having an emission peak from 550–600 nm, a deep red phosphor having an emission peak at 615–665 nm, and a red phosphor having an emission peak at 600–670 nm.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: October 10, 2006
    Assignees: General Electric Company, GELcore, LLC
    Inventors: Thomas Soules, William Beers, Michael Greci, Anant Setlur, Holly Comanzo, Venkatesan Manivannan, Alok Srivastava
  • Publication number: 20060214115
    Abstract: An adaptable imaging assembly is provided. The adaptable imaging assembly includes a free-standing phosphor film configured to receive incident radiation and to emit corresponding optical signals. An electronic device is coupled to the free-standing phosphor film. The electronic device is configured to receive the optical signals from the free-standing phosphor film and to generate an imaging signal. A free-standing phosphor film is also provided and includes x-ray phosphor particles dispersed in a silicone binder. A method for inspecting a component is also provided and includes exposing the component and a free-standing phosphor film to radiation, generating corresponding optical signals with the free standing phosphor film, receiving the optical signals with an electronic device coupled to the free-standing phosphor film and generating an imaging signal using the electronic device.
    Type: Application
    Filed: March 23, 2005
    Publication date: September 28, 2006
    Inventors: Venkatesan Manivannan, Clifford Bueno, Steven Duclos, Stanley Stoklosa, Douglas Albagli, Paul Mc Connelee
  • Patent number: 7077980
    Abstract: A phosphor comprises europium, at least two alkaline-earth metals, and at least a Group-13 metal. In one embodiment, the phosphor has a formula selected from the group consisting of Sr4-a-zAaEuzD12O22 and Sr4-a-zAaEuzD14O25; wherein A is at least an alkaline-earth metal other than strontium; D is an element selected from the group consisting of Group-13 metals, group-3 metals, and rare-earth metals; 0<a<4; 0.001<z<0.3; and 4-a-z>0. The phosphor can be used in light sources and displays.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: July 18, 2006
    Assignee: General Electric Company
    Inventors: Gopi Chandran Ramachandran, Mukunda Srinivas Adyam, Shankar Madras Venugopal, Anant Achyut Setlur, Alok Mani Srivastava, Holly Ann Comanzo, Venkatesan Manivannan, William Winder Beers
  • Publication number: 20060151747
    Abstract: A quantum-splitting fluoride-based phosphor comprises gadolinium, at least a first alkali metal, and a rare-earth metal activator. The phosphor is made in a solid-state method without using HF gas.
    Type: Application
    Filed: January 10, 2005
    Publication date: July 13, 2006
    Inventors: Venkatesan Manivannan, Alok Srivastava, Holly Comanzo
  • Publication number: 20060127562
    Abstract: In one embodiment the present invention discloses a method for making a first layer in an electroactive device comprising the steps of (i) preparing a composition by mixing at least one adhesion promoter material and at least one electroactive material; and (ii) depositing said composition onto a second electroactive layer of said electroactive device; and (iii) optionally further depositing a third electroactive layer onto the surface of said first layer opposite the second layer, wherein said composition enables adhesion between said first layer and said second layer or between said first layer and said third layer, or between said first layer and both said second layer and said third layer.
    Type: Application
    Filed: December 15, 2004
    Publication date: June 15, 2006
    Inventors: Larry Lewis, Venkatesan Manivannan, Tami Faircloth, Jie Liu, James Cella
  • Patent number: 7056451
    Abstract: A phosphor comprises a material having a formula of AB3O6:Ce,Mn, wherein A is at least a rare-earth metal other than cerium. The phosphor can be used in light sources and displays.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: June 6, 2006
    Assignee: General Electric Company
    Inventors: Venkatesan Manivannan, Alok Mani Srivastava, Holly Ann Comanzo
  • Patent number: 7053425
    Abstract: A gas sensor device including a semiconductor substrate; one or more catalytic gate-electrodes deposited on a surface of the semiconductor substrate; one or more ohmic contacts deposited on the surface of the semiconductor substrate and a passivation layer deposited on at least a portion of the surface; wherein the semiconductor substrate includes a material selected from the group consisting of silicon carbide, diamond, Group III nitrides, alloys of Group III nitrides, zinc oxide, and any combinations thereof.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: May 30, 2006
    Assignee: General Electric Company
    Inventors: Peter Micah Sandvik, Vinayak Tilak, Jesse Tucker, Stanton Earl Weaver, David Mulford Shaddock, Jonathan Lloyd Male, John Patrick Lemmon, Mark Allen Woodmansee, Venkatesan Manivannan, Deborah Ann Haitko
  • Publication number: 20060110618
    Abstract: Disclosed herein is an article comprising a substrate; and a columnar structure, wherein the columnar structure comprises a semi-conductor and is disposed upon the substrate in a manner wherein the longitudinal axis of the columnar structures is substantially perpendicular to the substrate. Disclosed herein is an electrode that comprises a substrate upon which is disposed an electron transport coating, wherein the electron transport coating comprises a columnar structure.
    Type: Application
    Filed: November 24, 2004
    Publication date: May 25, 2006
    Inventors: Venkatesan Manivannan, John Gui, Charles Iacovangelo, William Morrison
  • Patent number: 7019452
    Abstract: A boron-containing phosphor comprises a material having a formula of AD1?xEuxB9O16, wherein A is an element selected from the group consisting of Ba, Sr, Ca, Mg, and combinations thereof; D is at least an element selected from the group consisting of rare-earth metals other than europium; and x is in the range from about 0.005 to about 0.5. The phosphor is used in a blend with other phosphors in a light source for generating visible light with a high color rendering index.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: March 28, 2006
    Assignee: General Electric Company
    Inventors: Alok Mani Srivastava, Holly Ann Comanzo, Venkatesan Manivannan
  • Publication number: 20060033070
    Abstract: A quantum-splitting phosphor has a formula of ADF5:Pr3+, wherein A is at least one alkaline-earth metal and D is at least one Group-IIIB metal. The phosphor is made in a solid-state method without using hazardous HF gas. The phosphor can be used alone or in conjunction with other phosphors in light sources and displays wherein it can be excited by VUV radiation, and increase the efficiency of these devices.
    Type: Application
    Filed: August 13, 2004
    Publication date: February 16, 2006
    Inventors: Venkatesan Manivannan, Alok Srivastava, Holly Comanzo
  • Publication number: 20050285041
    Abstract: A scintillator composition of a halide perovskite material of at least one ABX3 type halide perovskite, at least one activator for the matrix material and optionally at least one charge compensator to assist the incorporation of the activator in the perovskite lattice and any reaction products thereof. Radiation detectors that use the scintillators are also described, as are related methods for detecting high-energy radiation and method of producing an activated halide-perovskite based scintillator crystal.
    Type: Application
    Filed: June 28, 2004
    Publication date: December 29, 2005
    Inventors: Alok Srivastava, Steven Duclos, Holly Comanzo, Venkat Venkataramani, Venkatesan Manivannan
  • Publication number: 20050242327
    Abstract: A phosphor comprises europium, at least two alkaline-earth metals, and at least a Group-13 metal. In one embodiment, the phosphor has a formula selected from the group consisting of Sr4-a-zAaEuzD12O22 and Sr4-a-zAaEuzD14O25; wherein A is at least an alkaline-earth metal other than strontium; D is an element selected from the group consisting of Group-13 metals, group-3 metals, and rare-earth metals; 0<a<4; 0.001<z<0.3; and 4-a-z>0. The phosphor can be used in light sources and displays.
    Type: Application
    Filed: May 3, 2004
    Publication date: November 3, 2005
    Inventors: Gopi Ramachandran, Mukunda Adyam, Shankar Venugopal, Anant Setlur, Alok Srivastava, Holly Comanzo, Venkatesan Manivannan, William Beers
  • Publication number: 20050242326
    Abstract: A phosphor comprises a borate of terbium, at least an alkaline-earth metal, and at least a Group-3 metal. In one embodiment, the phosphor has a formula of A3(D1-xTbx)3(BO3)5; wherein A is at least an alkaline-earth metal selected from the group consisting of calcium, barium, strontium, and magnesium; D is at least a Group-3 metal selected from the group consisting of lanthanum, scandium, and yttrium; and 0<x<0.5. The phosphor can be used in light sources such as those based on mercury discharge or light-emitting diodes and in displays.
    Type: Application
    Filed: April 29, 2004
    Publication date: November 3, 2005
    Inventors: Holly Comanzo, Venkatesan Manivannan, Alok Srivastava, William Beers
  • Publication number: 20050179358
    Abstract: A fluorescent lamp including a phosphor layer comprising a phosphor blend including four or more optimized phosphors emitting within a specific spectral range to optimize luminosity for a given color rendering index (CRI) and color coordinated temperature (CCT). The blend will include at least four phosphors selected from the following: a blue phosphor having an emission peak at 440-490 nm, a blue-green phosphor having an emission peak at 475-525 nm, a green phosphor having an emission peak at 515-550 nm, an orange phosphor having an emission peak from 550-600 nm, a deep red phosphor having an emission peak at 615-665 nm, and a red phosphor having an emission peak at 600-670 nm.
    Type: Application
    Filed: March 30, 2005
    Publication date: August 18, 2005
    Inventors: Thomas Soules, William Beers, Michael Greci, Anant Setlur, Holly Comanzo, Venkatesan Manivannan, Alok Srivastava
  • Publication number: 20050156503
    Abstract: A phosphor comprises a material having a formula of AB3O6:Ce,Mn, wherein A is at least a rare-earth metal other than cerium. The phosphor can be used in light sources and displays.
    Type: Application
    Filed: January 21, 2004
    Publication date: July 21, 2005
    Inventors: Venkatesan Manivannan, Alok Mani Srivastava, Holly Ann Comanzo
  • Publication number: 20050097941
    Abstract: A gas sensor device including a semiconductor substrate; one or more catalytic gate-electrodes deposited on a surface of the semiconductor substrate; one or more ohmic contacts deposited on the surface of the semiconductor substrate and a passivation layer deposited on at least a portion of the surface; wherein the semiconductor substrate includes a material selected from the group consisting of silicon carbide, diamond, Group III nitrides, alloys of Group III nitrides, zinc oxide, and any combinations thereof.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 12, 2005
    Inventors: Peter Sandvik, Vinayak Tilak, Jesse Tucker, Stanton Weaver, David Shaddock, Jonathan Male, John Lemmon, Mark Woodmansee, Venkatesan Manivannan, Deborah Haitko
  • Publication number: 20050092968
    Abstract: A phosphor comprises: (a) at least a first metal selected from the group consisting of yttrium and elements of lanthanide series other than europium; (b) at least a second metal selected from the group consisting of aluminum, gallium, indium, and scandium; (c) boron; and (d) europium. The phosphor is used in light source that comprises a UV radiation source to convert UV radiation to visible light.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 5, 2005
    Inventors: Anant Setlur, Alok Srivastava, Holly Comanzo, Venkatesan Manivannan
  • Patent number: 6867536
    Abstract: A fluorescent lamp including a phosphor layer including Sr4Al14O25:Eu2+ (SAE) and at least one of each of a red, green and blue emitting phosphor. The phosphor layer can optionally include an additional, deep red phosphor and a yellow emitting phosphor. The resulting lamp will exhibit a white light having a color rendering index of 90 or higher with a correlated color temperature of from 2500 to 10000 Kelvin. The use of SAE in phosphor blends of lamps results in high CRI light sources with increased stability and acceptable lumen maintenance over, the course of the lamp life.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: March 15, 2005
    Assignee: General Electric Company
    Inventors: Alok Srivastava, Holly Comanzo, Venkatesan Manivannan, Anant Achyut Setlur