Patents by Inventor Akito Sakai

Akito Sakai 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: 11683985
    Abstract: A thermoelectric conversion element is made of a material with a band structure having Weyl points in the vicinity of Fermi energy. The thermoelectric conversion element has a thermoelectric mechanism for generating electromotive force by the anomalous Nernst effect. A thermoelectric conversion device includes a substrate; and a power generator provided on the substrate and including a plurality of thermoelectric conversion elements. Each of the plurality of thermoelectric conversion elements has a shape extending in one direction, and is made of a material identical to that of the above-mentioned thermoelectric conversion element. The plurality of thermoelectric conversion elements is arranged in parallel to one another in a direction perpendicular to the one direction and electrically connected in series to one another in a serpentine shape.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: June 20, 2023
    Assignee: THE UNIVERSITY OF TOKYO
    Inventors: Satoru Nakatsuji, Akito Sakai
  • Publication number: 20220246820
    Abstract: A thermoelectric conversion element is made of: a first material with a stoichiometric composition of Fe3X where X is a main-group or a transition element; a second material with an off-stoichiometric composition in which a composition ratio of Fe to X deviates from that of the first material; a third material obtained by substituting part of Fe sites in the first material or part of Fe sites in the second material by a main-group metal or a transition element other than X; a fourth material with a composition of Fe3M11-xM2x (0<x<1) where M1 and M2 are different main-group elements; or a fifth material obtained by substituting part of Fe sites in the first material by a transition element other than X and substituting part of X sites in the first material by a main-group metal element other than X. The first to the fifth materials exhibit an anomalous Nernst effect.
    Type: Application
    Filed: April 27, 2020
    Publication date: August 4, 2022
    Inventors: Satoru Nakatsuji, Akito Sakai, Tomoya Higo
  • Publication number: 20200212282
    Abstract: A thermoelectric conversion element is made of a material with a band structure having Weyl points in the vicinity of Fermi energy. The thermoelectric conversion element has a thermoelectric mechanism for generating electromotive force by the anomalous Nernst effect. A thermoelectric conversion device includes a substrate; and a power generator provided on the substrate and including a plurality of thermoelectric conversion elements. Each of the plurality of thermoelectric conversion elements has a shape extending in one direction, and is made of a material identical to that of the above-mentioned thermoelectric conversion element. The plurality of thermoelectric conversion elements is arranged in parallel to one another in a direction perpendicular to the one direction and electrically connected in series to one another in a serpentine shape.
    Type: Application
    Filed: July 3, 2018
    Publication date: July 2, 2020
    Inventors: Satoru Nakatsuji, Akito Sakai
  • Publication number: 20100291130
    Abstract: Embodiments described herein include nucleic acid sequences, which encode hepatitis C virus of strain HC-TN, genotype 1a, proteins and polypeptides and fragments thereof. Use of these compositions, and diagnostics for HCV and in the development of screening assays for the identification of antiviral agents for HCV are also contemplated.
    Type: Application
    Filed: December 14, 2009
    Publication date: November 18, 2010
    Applicants: OF HEALTH AND HUMAN SERVICES
    Inventors: Jens Bukh, Robert H. Purcell, Suzanne U. Emerson, Akito Sakai, Patrizia Farci
  • Patent number: 7678569
    Abstract: Embodiments described herein include nucleic acid sequences, which encode hepatitis C virus of strain HC-TN, genotype 1a, proteins and polypeptides and fragments thereof. Use of these compositions, and diagnostics for HCV and in the development of screening assays for the identification of antiviral agents for HCV are also contemplated.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: March 16, 2010
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Jens Bukh, Robert H. Purcell, Suzanne U. Emerson, Akito Sakai
  • Publication number: 20090252755
    Abstract: Embodiments described herein include nucleic acid sequences, which encode hepatitis C virus of strain HC-TN, genotype 1a, proteins and polypeptides and fragments thereof. Use of these compositions, and diagnostics for HCV and in the development of screening assays for the identification of antiviral agents for HCV are also contemplated.
    Type: Application
    Filed: April 2, 2008
    Publication date: October 8, 2009
    Inventors: Jens Bukh, Robert H. Purcell, Suzanne U. Emerson, Akito Sakai
  • Patent number: 7056507
    Abstract: An adsorbent for removing hepatitis C virus which has the ability to adsorb HCV particles, particularly immune-complex HCV particles, from a patient's body blood safely and with high efficiency and high selectivity for enhancing the efficacy of interferon therapy, an HCV adsorption apparatus including said adsorbent, and a adsorbing method for removing HCV are provided. An adsorbent for removing hepatitis C virus which comprises a compound capable of adsorbing hepatitis C virus as immobilized on a water-insoluble carrier, an adsorption apparatus including said adsorbent, and an adsorbing method for removing HCV.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: June 6, 2006
    Assignee: Kaneka Corporation
    Inventors: Eiji Ogino, Michio Nomura, Takashi Asahi, Shuichi Kaneko, Akito Sakai
  • Publication number: 20040006214
    Abstract: An adsorbent for removing hepatitis C virus which has the ability to adsorb HCV particles, particularly immune-complex HCV particles, from a patient's body blood safely and with high efficiency and high selectivity for enhancing the efficacy of interferon therapy, an HCV adsorption apparatus including said adsorbent, and a adsorbing method for removing HCV are provided.
    Type: Application
    Filed: June 11, 2003
    Publication date: January 8, 2004
    Applicant: Kaneka Corporation
    Inventors: Eiji Ogino, Michio Nomura, Takashi Asahi, Shuichi Kaneko, Akito Sakai
  • Patent number: 6600014
    Abstract: An adsorbent for removing hepatitis C virus which has the ability to adsorb HCV particles, particularly immune-complex HCV particles, from a patient's body blood safely and with high efficiency and high selectivity for enhancing the efficacy of interferon therapy, an HCV adsorption apparatus including said adsorbent, and a adsorbing method for removing HCV are provided. An adsorbent for removing hepatitis C virus which comprises a compound capable of adsorbing hepatitis C virus as immobilized on a water-insoluble carrier, an adsorption apparatus including said adsorbent, and an adsorbing method for removing HCV.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: July 29, 2003
    Assignee: Kaneka Corporation
    Inventors: Eiji Ogino, Michio Nomura, Takashi Asahi, Shuichi Kaneko, Akito Sakai
  • Publication number: 20030044769
    Abstract: An adsorbent for removing hepatitis C virus which has the ability to adsorb HCV particles, particularly immune-complex HCV particles, from a patient's body blood safely and with high efficiency and high selectivity for enhancing the efficacy of interferon therapy, an HCV adsorption apparatus including said adsorbent, and a adsorbing method for removing HCV are provided.
    Type: Application
    Filed: November 9, 1999
    Publication date: March 6, 2003
    Inventors: EIJI OGINO, MICHIO NOMURA, TAKASHI ASAHI, SHUICHI KANEKO, AKITO SAKAI
  • Patent number: 5988305
    Abstract: A hood structure for absorbing an impact applied to a hood of an automotive vehicle at collision has: a hood outer panel for closing an engine room; at least one impact absorb body disposed under the hood outer panel, for absorbing the impact applied to the hood when deformed; and an engine disposed under the impact absorb body, for stopping the deformed impact absorb body. Here, to reduce head injury criterion (HIC) effectively at a shortest possible stoke of the hood outer panel, an impact energy absorption rate of the impact absorb body and a total hollow gap formed between the hood outer panel and the engine are both determined in such a way that an impact energy generated at collision can be absorbed in accordance with an ideal impact energy absorption waveform Cm representative of an ideal relationship between reaction force and stroke of the deformed hood outer panel.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: November 23, 1999
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akito Sakai, Masanobu Yoshioka
  • Patent number: 5706908
    Abstract: A hood structure for absorbing an impact applied to a hood (31) of an automotive vehicle at collision has: a hood outer panel (33) for closing an engine room (35); at least one impact absorb body (43) disposed under the hood outer panel, for absorbing the impact applied to the hood when deformed; and an engine (37) disposed under the impact absorb body, for stopping the deformed impact absorb body. Here, to reduce head injury criterion (HIC) effectively at a shortest possible stoke of the hood outer panel, an impact energy absorption rate of the impact absorb body and a total hollow gap formed between the hood outer panel (33) and the engine (37) are both determined in such a way that an impact energy generated at collision can be absorbed in accordance with an ideal impact energy absorption waveform Cm representative of an ideal relationship between reaction force (F) and stroke (S) of the deformed hood outer panel.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: January 13, 1998
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akito Sakai, Masanobu Yoshioka
  • Patent number: 5222758
    Abstract: A structure for supporting a vehicle suspension unit to a floor panel of a vehicle includes a rear side member secured to a longitudinally extending side portion of the floor panel and a rear cross member secured to a laterally extending portion of the floor panel. The rear cross member has at a side end portion thereof an opening. A collar has a through bore mated with the opening. An upper reinforcing member is secured to the collar, the rear side member and the rear cross member. A lower reinforcing member is secured to the collar and the rear cross member. A suspension supporting bolt has a serrated portion which is so sized as to fit into the through bore of the collar. The suspension supporting bolt is secured to the collar by thrusting the serrated portion into the through bore of the collar. The suspension supporting bolt passes through the collar and the opening and is secured to the vehicle suspension unit.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: June 29, 1993
    Assignees: Nissan Motor Co., Ltd., Yorozu Corporation
    Inventors: Akito Sakai, Kunihiro Nishihara