Patents by Inventor Katsuko Tamatani

Katsuko Tamatani 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).

  • Luminescent material and light-emitting device
    Patent number: 8491817
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: July 23, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
  • Luminescent material and light-emitting device
    Patent number: 8482192
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: July 9, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
  • Luminescent material and light-emitting device
    Patent number: 8475680
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: July 2, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
  • Luminescent material and light-emitting device
    Patent number: 8450923
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: May 28, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
  • LUMINESCENT MATERIAL AND LIGHT-EMITTING DEVICE
    Publication number: 20110058582
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Inventors: Yumi FUKUDA, Masaaki Tamatani, Katsuko Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara
  • LUMINESCENT MATERIAL AND LIGHT-EMITTING DEVICE
    Publication number: 20110058583
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Inventors: Yumi FUKUDA, Masaaki Tamanani, Katsuko Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara
  • LUMINESCENT MATERIAL AND LIGHT-EMITTING DEVICE
    Publication number: 20110057149
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2 ??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Inventors: Yumi FUKUDA, Masaaki Tamanani, Katsuko Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara
  • LUMINESCENT MATERIAL AND LIGHT-EMITTING DEVICE
    Publication number: 20090096361
    Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).
    Type: Application
    Filed: September 10, 2008
    Publication date: April 16, 2009
    Inventors: Yumi Fukuda, Masaaki Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani