Patents by Inventor Keiji Hirabayashi

Keiji Hirabayashi 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: 9481595
    Abstract: Provided is a method of producing an optical element forming mold, the method including forming a ta-C film 12 on a mold matrix 10 for an optical element forming mold by an FCVA process, in which the mold matrix 10 is kept at a floating potential, a voltage is applied to a mold matrix-holding member 2 for holding the mold matrix via insulating members (3a,3b), and a magnet 4 internally provided in the mold matrix forms a magnetic field for applying a magnetic force in a normal direction of a transfer surface of the mold matrix so as to follow a magnetic force applied by a filter coil 22, thereby homogenizing the film quality.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: November 1, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Kubo, Shigeru Hashimoto, Keiji Hirabayashi, Koji Teranishi, Yusuke Owaki
  • Patent number: 9480695
    Abstract: The invention provides a method for producing an orexin neuron by culturing a pluripotent stem cell or a neural progenitor cell in the presence of N-acetyl-D-mannosamine and optionally in the presence of at least one inhibitor selected from the group consisting of a Sirtuin 1 inhibitor and an O-linked ?-N-acetylglucosamine transferase inhibitor. The invention also provides a therapeutic agent for narcolepsy or eating disorders, such as anorexia, containing N-acetyl-D-mannosamine, which is based on the induction of orexin neuron in vivo.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: November 1, 2016
    Assignee: The University of Tokyo
    Inventors: Kunio Shiota, Shintaro Yagi, Koji Hayakawa, Mitsuko Hirosawa-Takamori, Daisuke Arai, Keiji Hirabayashi
  • Publication number: 20140349964
    Abstract: The invention provides a method for producing an orexin neuron by culturing a pluripotent stem cell or a neural progenitor cell in the presence of N-acetyl-D-mannosamine and optionally in the presence of at least one inhibitor selected from the group consisting of a Sirtuin 1 inhibitor and an O-linked ?-N-acetylglucosamine transferase inhibitor. The invention also provides a therapeutic agent for narcolepsy or eating disorders, such as anorexia, containing N-acetyl-D-mannosamine, which is based on the induction of orexin neuron in vivo.
    Type: Application
    Filed: March 25, 2014
    Publication date: November 27, 2014
    Inventors: Kunio SHIOTA, Shintaro YAGI, Koji HAYAKAWA, Mitsuko HIROSAWA-TAKAMORI, Daisuke ARAI, Keiji HIRABAYASHI
  • Publication number: 20130056891
    Abstract: Provided is a method of producing an optical element forming mold, the method including forming a ta-C film 12 on a mold matrix 10 for an optical element forming mold by an FCVA process, in which the mold matrix 10 is kept at a floating potential, a voltage is applied to a mold matrix-holding member 2 for holding the mold matrix via insulating members (3a,3b), and a magnet 4 internally provided in the mold matrix forms a magnetic field for applying a magnetic force in a normal direction of a transfer surface of the mold matrix so as to follow a magnetic force applied by a filter coil 22, thereby homogenizing the film quality.
    Type: Application
    Filed: May 25, 2011
    Publication date: March 7, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroyuki Kubo, Shigeru Hashimoto, Keiji Hirabayashi, Koji Teranishi, Yusuke Owaki
  • Publication number: 20090221066
    Abstract: The present invention provides a method of preparing an anti-methylated DNA antibody, comprising a step of administering to an animal an oligodeoxyribonucleotide containing a methylated cytosine(s) and an oligodeoxyribonucleotide containing no methylated cytosine. The antibody prepared by this method is capable of detecting a DNA containing a methylated cytosine(s) in a state close to the state of a biological component.
    Type: Application
    Filed: March 27, 2007
    Publication date: September 3, 2009
    Inventors: Kunio Shiota, Shintaro Yagi, Fumiko Sunaga, Keiji Hirabayashi
  • Patent number: 6184059
    Abstract: A diamond product comprising a semiconductor layer having an outer surface region of graphite in contact with the metal electrode to form an ohmic junction with the metal electrode, wherein the outer surface region of graphite has a thickness of at least about 12 Å.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: February 6, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Hirabayashi, Masaaki Matsushima
  • Patent number: 5807432
    Abstract: A diamond covered member which has a diamond crystal layer is formed by vapor phase synthesis on a surface of a substrate. The process comprises depositing plate-shaped diamond crystals by CVD at a carbon source concentration ranging from 0.01 to 10% at an atomic ratio of oxygen to carbon (O/C) of 0.5.ltoreq.(O/C).ltoreq.1.2 in a starting gas. The crystals may also be deposited by a burning flame method using an oxygen-acetylene flame at a molar ratio of oxygen to acetylene in a main starting gas in the range of 0.9.ltoreq.(O.sub.2 /C.sub.2 H.sub.2).ltoreq.1.0. The plate-shaped diamond crystals are grown to coalesce into a film to form the diamond crystal layer.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: September 15, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiji Hirabayashi
  • Patent number: 5720808
    Abstract: In a method for forming a diamond film by a high-frequency plasma CVD method, an inductive coupling discharge is used and the frequency of a high-frequency wave is set in the range of from 40 to 250 MHz, whereby a starting gas containing carbon is decomposed in a plasma state and a diamond film is formed on a substrate.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: February 24, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Hirabayashi, Toshiaki Yoshikawa
  • Patent number: 5676723
    Abstract: There is disclosed a mold for pressing molding of an optical element of glass. On at least the molding surface of the mold base of the mold, there is formed a mixing layer which consists of carbon and at least one of the elements constituting the mold base. The atomic percentage of carbon increases toward the molding surface and decreases toward the mold base, while the atomic percentage of the other element decreases toward the surface and increases toward the mold base. The mold may contain an intermediate layer at least on the molding surface of the mold base.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: October 14, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Taniguchi, Keiji Hirabayashi
  • Patent number: 5632812
    Abstract: A diamond electronic device constituted of a diamond crystal formed on a substrate comprises a diamond crystal having the ratio (h/L) of length (h) of the diamond crystal in direction substantially perpendicular to the face of the substrate to length (L) of the diamond crystal in direction parallel to the face of the substrate ranging from 1/4 to 1/1000 and an upper face of the diamond crystal making an angle of from substantially 0.degree. to 10.degree. to the face of the substrate, and a semiconductor layer and an electrode layer provided on the diamond crystal, wherein the diamond crystal serves as a heat-radiating layer.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 27, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiji Hirabayashi
  • Patent number: 5607560
    Abstract: A diamond crystal forming method with which a diamond crystal is formed on a substrate by a sputtering process uses high-frequency energy in the frequency range of 40 MHz to 250 MHz to form plasma.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: March 4, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Hirabayashi, Atsushi Yamagami
  • Patent number: 5576107
    Abstract: A diamond crystal comprises a tabular diamond crystal formed on a substrate by gas phase synthesis, wherein the diamond crystal has a ratio of thickness to width of from 1:4 to 1:1,000 and the surface of the substrate on which the diamond crystal has been formed and the top surface of the diamond crystal are at an angle ranging from 0.degree. to 10.degree..
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: November 19, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Hirabayashi, Yoichi Hirose
  • Patent number: 5541423
    Abstract: A diamond semiconductor device has a pn junction formed by a p-type diamond semiconductor portion containing boron as an impurity and an n-type diamond semiconductor portion containing lithium as an impurity. The diamond semiconductor is formed by a diamond crystal growth on a single nucleation site on an insulating substrate. Electroluminescene takes place in the diamond crystal.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: July 30, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiji Hirabayashi
  • Patent number: 5483084
    Abstract: A diamond covered member is provided which has a diamond crystal layer formed by vapor phase synthesis on a surface of a substrate, the diamond crystal layer being constituted of plate-shaped diamond crystals at least at an initial stage of crystal growth, and being a polycrystal film formed by growth and coalescence of the plate-shaped diamond crystals, and the polycrystal film being uniformly oriented and having surface roughness (Rmax) of not larger than 0.2 .mu.m. A process for producing the diamond covered member is also provided. The diamond covered member has high hardness, high thermal conductivity, and high chemical stability.
    Type: Grant
    Filed: March 9, 1994
    Date of Patent: January 9, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiji Hirabayashi
  • Patent number: 5445851
    Abstract: A tabular diamond crystal is formed on a substrate by gas phase synthesis, wherein the diamond crystal has a ratio of thickness to width of from 1:4 to 1:1,000 and the surface of the substrate on which the diamond crystal has been formed and the top surface of the diamond crystal are at an angle ranging from 0.degree. to 10.degree..
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: August 29, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Hirabayashi, Yoichi Hirose
  • Patent number: 5382274
    Abstract: A mold for use for press-molding an optical element, in which a molding surface of a mold base material is coated with a hard carbon film containing 0-5 atom% of hydrogen. It has a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film density of at least 1.5 g/cm.sup.3.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: January 17, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyoshi Yamamoto, Keiji Hirabayashi, Noriko Kurihara, Yasushi Taniguchi, Keiko Ikoma
  • Patent number: 5380349
    Abstract: A diamond sintered product having diamond particles sintered with a suitable sintering aid is the most suitable as the material for the mold for optical element molding, because it has in combination the advantage of diamond that no fusion with glass at high temperature occurs and oxidation occurs with difficulty to give rise to no precipitation of lead, an appropriate hardness and also the advantage that mirror polishing is possible. "There is also disclosed a mold which has a diamond layer having a (100) face, made by the CVD method utilizing gas having 1-3% methane in hydrogen.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: January 10, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Taniguchi, Keiji Hirabayashi, Keiko Ikoma, Noriko Kurihara, Masaaki Matsushima, Kiyoshi Yamamoto
  • Patent number: 5275967
    Abstract: An electric field effect light emitting device comprises a light emitting layer consisting of a diamond-like carbon film containing oxygen.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: January 4, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Taniguchi, Keiji Hirabayashi, Noriko Kurihara, Keiko Ikoma
  • Patent number: 5210430
    Abstract: An electric field effect light emitting device comprises a light emitting layer consisting of a diamond-like carbon film containing oxygen.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: May 11, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Taniguchi, Keiji Hirabayashi, Noriko Kurihara, Keiko Ikoma
  • Patent number: 5202156
    Abstract: This specification discloses a mold for use for press-molding an optical element, characterized in that at least the molding surface of a mold base material is coated with an a-C:H film containing 5-40 atom % of hydrogen therein and having a film density of 1.5 g/cm.sup.3 or more, and with hard carbon film containing 0-5 atom % of hydrogen therein and having a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film density of 1.5 g/cm.sup.3 or more.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: April 13, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyoshi Yamamoto, Keiji Hirabayashi, Noriko Kurihara, Yasushi Taniguchi, Keiko Ikoma