Patents by Inventor Akira Tsuboyama

Akira Tsuboyama 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: 11285661
    Abstract: A powder for ceramic shaping to be used for obtaining a structure by repeating the execution of a process of sequential melting and solidification by irradiation of a laser beam contains inorganic compound particles and an organic compound, the organic compound being provided on the surfaces of the inorganic compound particles, and the organic compound has an absorption band that overlaps the wavelength of the laser beam.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: March 29, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hisato Yabuta, Nobuhiro Yasui, Kanako Oshima, Akira Tsuboyama
  • Publication number: 20210270823
    Abstract: A diagnostic agent for use in detecting a target substance in a specimen, including a mixture of: a photosensitizer-loaded particle containing a photosensitizer that generates singlet oxygen during light irradiation; a fluorescent dye-loaded particle containing a fluorescent dye that changes in luminescent characteristics depending on an oxidation reaction with the singlet oxygen; and an aggregation inhibitor that inhibits aggregation of the photosensitizer-loaded particle and the fluorescent dye-loaded particle, characterized in that at least one of the photosensitizer-loaded particle and the fluorescent dye-loaded particle has the property of binding to the target substance, and the surface of the photosensitizer-loaded particles and the surface of the fluorescent dye-loaded particles have a stimulus-responsive polymer, a diagnostic kit for producing the diagnostic agent, and a diagnostic method with the use of a component of the diagnostic agent.
    Type: Application
    Filed: February 18, 2021
    Publication date: September 2, 2021
    Inventors: Masaru Sugita, Masataka Yashima, Kyohei Wada, Koichi Sato, Akira Tsuboyama
  • Publication number: 20200300799
    Abstract: A pair of electrodes; and a reactive layer electrically in contact with the pair of electrodes are included. The reactive layer includes a palladium metal complex represented by General formula (1) below, and a change in electric conductivity between the pair of electrodes is measured to detect a reducing gas. The change is caused by an irreversible redox reaction between the palladium metal complex and the reducing gas. where each of OR1 to OR4 is a monodentate ligand, or forms a polydentate ligand by bonding to each other, or forms a bridging ligand by bonding to a palladium atom different from the palladium atom in General formula (1), and R1 to R4 each have one or more carbons and may be the same or different.
    Type: Application
    Filed: June 9, 2020
    Publication date: September 24, 2020
    Inventors: Akira Tsuboyama, Koji Yano
  • Publication number: 20190346392
    Abstract: Provided is a reducing gas detection sensor which has sensitivity improved as compared to that of the related art, and in which power consumption is decreased. The reducing gas detection sensor includes: a reducing gas detection material including a palladium compound and a carbon compound, and having reactivity with a reducing gas; and a unit configured to measure a conductivity of the reducing gas detection material.
    Type: Application
    Filed: April 26, 2019
    Publication date: November 14, 2019
    Inventors: Akira Tsuboyama, Koji Yano
  • Publication number: 20190134893
    Abstract: A powder for ceramic shaping to be used for obtaining a structure by repeating the execution of a process of sequential melting and solidification by irradiation of a laser beam contains inorganic compound particles and an organic compound, the organic compound being provided on the surfaces of the inorganic compound particles, and the organic compound has an absorption band that overlaps the wavelength of the laser beam.
    Type: Application
    Filed: November 2, 2018
    Publication date: May 9, 2019
    Inventors: Hisato Yabuta, Nobuhiro Yasui, Kanako Oshima, Akira Tsuboyama
  • Publication number: 20160363879
    Abstract: This invention provides a toner excellent in color development properties. The purpose can be achieved by using a toner containing a compound having a specific structure.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 15, 2016
    Inventors: Akira Tsuboyama, Akiko Kitao, Takeshi Sekiguchi
  • Publication number: 20150076478
    Abstract: A metal coordination compound represented by any one of formulas (1)-(5). An organic luminescence device including an anode, a cathode, and an organic layer, which contains the metal coordination compound, disposed between the anode and the cathode.
    Type: Application
    Filed: November 6, 2014
    Publication date: March 19, 2015
    Inventors: Jun Kamatani, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Koji Noguchi, Takashi Moriyama, Satoshi Igawa, Manabu Furugori
  • Patent number: 8920943
    Abstract: A metal coordination compound represented by the formula: An organic luminescence device including an anode, a cathode, and an organic layer, which contains the metal coordination compound, disposed between the anode and the cathode.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: December 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Koji Noguchi, Takashi Moriyama, Satoshi Igawa, Manabu Furugori
  • Patent number: 8080322
    Abstract: An object of the present invention is to provide a light emitting device having high luminous efficiency and high stability. The light emitting device includes two electrodes and a light emitting layer interposed between the two electrodes, in which the light emitting layer contains luminous nanoparticles, and the luminous nanoparticles each have a particle diameter smaller than a thickness of the light emitting layer, and each include a metal coordination compound having a ligand formed of an organic compound.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 20, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Tsuboyama, Kazunori Ueno, Takayuki Teshima, Koichi Suzuki
  • Patent number: 8076841
    Abstract: An organic electroluminescent display apparatus having organic electroluminescent devices each of which is excellent in color reproducibility and has high emission efficiency in which green organic electroluminescent devices each have a delayed fluorescent material and a microcavity, and the hole transport layer of each of the devices has the same thickness as that of the hole transport layer of each of blue organic electroluminescent devices.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: December 13, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoru Shiobara, Toshifumi Mori, Kenichi Ikari, Koichi Suzuki, Akira Tsuboyama
  • Patent number: 8076681
    Abstract: A high-efficiency, white organic electroluminescent device has such a structure that its emission layer is obtained by laminating sub-emission layers of red, green, and blue, respectively. The green sub-emission layer contacting a hole transport layer has a delayed fluorescent material, and the red sub-emission layer has a phosphorescent light emitting material.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: December 13, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshifumi Mori, Koichi Suzuki, Akira Tsuboyama, Satoru Shiobara, Kenichi Ikari
  • Patent number: 8067099
    Abstract: Provided is an organic electroluminescent device which has a high efficiency and high durability.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: November 29, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taiki Watanabe, Akira Tsuboyama, Kazunori Ueno, Jun Kamatani
  • Patent number: 8007925
    Abstract: The present invention provides an organic electroluminescence device using a novel phosphorescent metal complex compound and having high efficiency, high luminance, and high durability. The organic electroluminescence device includes a pair of electrodes including an anode and a cathode, and one or more organic layers each containing an organic compound, the one or more organic layers being interposed between the pair of electrodes, wherein at least one of the one or more organic layers contain a phosphorescent metal complex compound having at least one ligand structure represented by the following general formula (1): where at least one of X, Y and Z represents an aromatic oligomer having 13 or more carbon atoms and bonded directly or via a linking group.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: August 30, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taiki Watanabe, Akira Tsuboyama, Satoru Shiobara, Koichi Suzuki, Kazunori Ueno
  • Publication number: 20110089821
    Abstract: A light emitting device comprises a pair of electrodes and an organic light emitting layer between the electrodes. The organic light emitting layer includes a host material, a first phosphorescent dopant, and a second dopant different from the first phosphorescent dopant. The amount of the second dopant is greater than the amount of the first dopant in the organic light emitting layer. The host material, the first phosphorescent dopant and the second dopant are mixed throughout the organic light emitting layer.
    Type: Application
    Filed: December 20, 2010
    Publication date: April 21, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Hironobu Iwawaki
  • Patent number: 7928650
    Abstract: Provided is an organic EL display apparatus including an organic EL device having a delayed fluorescence material which has good internal quantum efficiency and an organic EL device having a phosphorescent material. A soaking unit is provided in a plane in which the organic EL devices are provided.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: April 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshifumi Mori, Koichi Suzuki, Akira Tsuboyama, Satoru Shiobara, Kenichi Ikari
  • Patent number: 7910227
    Abstract: A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. As the first dopant, there is employed a phosphorescent dopant. The amount of the second dopant is greater than the amount of the first dopant.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: March 22, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Hironobu Iwawaki
  • Patent number: 7875366
    Abstract: The present invention provides a luminescent device using a luminescent material which has high luminescence efficiency and high stability, and is available at a low cost. The luminescent device is characterized in that as a luminescent material is used a binuclear copper coordination compound having a partial structure represented by the general formula (1): Cu-A-Cu, wherein Cu is a copper ion and A is a bidentate ligand.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: January 25, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Tsuboyama, Jun Kamatani, Manabu Furugori, Shinjiro Okada, Takao Takiguchi
  • Patent number: 7834135
    Abstract: To provide a light emitting device capable of emitting light with high efficiency and of being formed by a coating process, the present invention provides a light emitting device including as a light emitting material a polymeric mixed-metal complex containing two or more kinds of metals selected from Cu, Ag, and Au.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: November 16, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Tsuboyama, Kazunori Ueno, Yoichi Sasaki, Kiyoshi Tsuge, Seiko Shibata, Motoshi Tamura
  • Patent number: 7808175
    Abstract: Provided is a light emitting material of which a light emitting device having high luminous efficiency and high stability and capable of being provided at a low cost can be formed. A light emitting material includes the following partial structural formula (1): wherein at least one of R1 to R10 represents a substituent except a hydrogen atom, a total number of benzene ring structures in R1 to R10 is 3 or more, and R1 to R10 include a trifluoromethyl group, or a linear, branched, or cyclic alkyl or alkoxyl group having 2 or more carbon atoms a hydrogen atom of which may be substituted by a halogen atom.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: October 5, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Tsuboyama, Koichi Suzuki, Taiki Watanabe, Kazunori Ueno
  • Patent number: 7790299
    Abstract: A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. The first and second dopants are metal organic complex compounds having the same central metal, and the second dopant transmitting energy to the first dopant.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: September 7, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Hironobu Iwawaki