Patents by Inventor Tetsuichi Kudo

Tetsuichi Kudo 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: 10566618
    Abstract: The present invention provides a cell that has a high theoretical voltage and theoretical capacity, and can be discharged and recharged multiple times. The cell includes a cathode, an anode, and an electrolyte, wherein the cathode contains a cathode active material containing an alkali metal compound represented by the formula (1): AxOy??(1) (wherein A is an alkali metal atom, x is 0.5 to 2.5, and y is 0.5 to 2.5), the anode contains an anode active material containing at least one selected from the group consisting of an alkali metal, tin, titanium, boron, nitrogen, silicon, and carbon, and the cathode, the anode, and the electrolyte are hermetically sealed in the cell.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: February 18, 2020
    Assignees: The University of Tokyo, Nippon Shokubai Co., Ltd.
    Inventors: Noritaka Mizuno, Tetsuichi Kudo, Mitsuhiro Hibino, Yoshiyuki Ogasawara, Yosuke Suga, Atsuo Yamada, Yuki Yamada, Shin-ichi Okuoka, Koji Yonehara, Hironobu Ono, Yasutaka Sumida
  • Publication number: 20150280230
    Abstract: The present invention provides a cell that has a high theoretical voltage and theoretical capacity, and can be discharged and recharged multiple times. The cell includes a cathode, an anode, and an electrolyte, wherein the cathode contains a cathode active material containing an alkali metal compound represented by the formula (1): AxOy??(1) (wherein A is an alkali metal atom, x is 0.5 to 2.5, and y is 0.5 to 2.5), the anode contains an anode active material containing at least one selected from the group consisting of an alkali metal, tin, titanium, boron, nitrogen, silicon, and carbon, and the cathode, the anode, and the electrolyte are hermetically sealed in the cell.
    Type: Application
    Filed: September 25, 2013
    Publication date: October 1, 2015
    Applicants: The University of Tokyo, Nippon Shokubai Co., Ltd.
    Inventors: Noritaka Mizuno, Tetsuichi Kudo, Mitsuhiro Hibino, Yoshiyuki Ogasawara, Yosuke Suga, Atsuo Yamada, Yuki Yamada, Shin-ichi Okuoka, Koji Yonehara, Hironobu Ono, Yasutaka Sumida
  • Publication number: 20130260224
    Abstract: The present invention provides a new rocking-chair-type battery employing oxygen ions as a charge shuttle that can be used to replace lithium ion batteries. The battery of the present invention is an oxygen shuttle battery comprising two electrodes that are comprised of a compound capable of oxygen intercalation at least in part and an electrolyte permeable to oxygen atoms that is present between the two electrodes. The compound capable of oxygen intercalation is, for example, at least one compound selected from the compound denoted by the general formula AMOz, where A denotes 1 or 2 or more monovalent elements, divalent elements, or trivalent elements, and M denotes 1 or 2 or more monovalent elements, divalent elements, or trivalent elements, with 2.0<Z?3.0.
    Type: Application
    Filed: October 12, 2012
    Publication date: October 3, 2013
    Applicant: THE UNIVERSITY OF TOKYO
    Inventors: Mitsuhiro HIBINO, Noritaka MIZUNO, Tetsuichi KUDO, Yosuke SUGA, Takeshi KIMURA
  • Patent number: 7625673
    Abstract: An electrode material for an electrochemical device comprising a composite of a particulate conductive material and a metal oxide is prepared by mixing and dispersing the particulate conductive material with a colloidal solution of an oxide of an element in a range of from Group 3 to Group 12 in the fourth, fifth and sixth periods of the Periodic Table and heating the mixture. This composite has a high capacity even at a high current density and good filling properties, and is useful as an electrode material for an electrochemical device such as a lithium secondary battery or an electrochemical capacitor. When the electrode material comprising this composite is used, an electrode can be produced without any binder, and the electrochemical device having good output characteristics can be constructed.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: December 1, 2009
    Assignees: Hitachi Maxell, Ltd., Japan as Represented by the President of the University of Tokyo
    Inventors: Tetsuichi Kudo, Masaru Miyayama, Keiji Sakai, Yasuo Takeda, Itaru Honma, Hiroshi Abe
  • Publication number: 20020172869
    Abstract: An electrode material for an electrochemical device comprising a composite of a particulate conductive material and a metal oxide is prepared by mixing and dispersing the particulate conductive material with a colloidal solution of an oxide of an element in a range of from Group 3 to Group 12 in the fourth, fifth and sixth periods of the Periodic Table and heating the mixture. This composite has a high capacity even at a high current density and good filling properties, and is useful as an electrode material for an electrochemical device such as a lithium secondary battery or an electrochemical capacitor. When the electrode material comprising this composite is used, an electrode can be produced without any binder, and the electrochemical device having good output characteristics can be constructed.
    Type: Application
    Filed: May 3, 2002
    Publication date: November 21, 2002
    Inventors: Tetsuichi Kudo, Masaru Miyayama, Keiji Sakai, Yasuo Takeda, Itaru Honma, Hiroshi Abe
  • Patent number: 5061599
    Abstract: A radiation-sensitive material comprising a polyacid composed of tungsten and niobium, titanium and/or tantalum. A uniform film can be formed by an easy spin coating method. The polyacid has a radiation sensitivity higher than that of a polyacid comprising only tungsten.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: October 29, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuichi Kudo, Akira Ishikawa, Hiroshi Okamoto, Katsuki Miyauchi, Takao Iwayanagi, Fumio Murai, Shinji Okazaki
  • Patent number: 5035478
    Abstract: A material for an optical component comprising polytungstic acid having peroxo groups, and an optical component, at least part of which is constituted of a thin film of the above-mentioned material. By using this material, a thin film of an inorganic material having an excellent stability is formed by the inexpensive wet painting method. An optical component using the above-mentioned thin film can be formed on an arbitrary substrate with high accuracy at a low temperature of about 100.degree. C. or below. The polytungstic acid may contain carbon as a heteroatom and/or may have Nb, Ti, V, Ta and/or Mo substituted for part of W.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: July 30, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Akira Ishikawa, Yukio Ito, Hiroshi Okamoto, Tetsuichi Kudo, Katsuki Miyauchi
  • Patent number: 4719161
    Abstract: There is disclosed a mask for X-ray lithography wherein a peroxopolytungsten compound is used as an absorber, and a process for producing the same. Since this compound has a sensitivity for electron beams and light and serves as an absorber for X-rays, a mask for X-ray lithorgraphy is made only by applying this compound to a substrate, exposing the same to light to form a transferred pattern, and effecting development. Thus, the step of etching the absorber which is essential in the conventional process, is not needed. Therefore, masks having a highly accurate pattern and few defects can be produced with a high production yield.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: January 12, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Takeshi Kimura, Kozo Mochiji, Hiroshi Okamoto, Takao Iwayanagi, Tetsuichi Kudo, Shinji Kuniyoshi
  • Patent number: 4699851
    Abstract: The present invention relates to a solid electrolyte comprising a heteropolyacid, the principal component of which is a heteropolytungstic acid and/or heteropolymolybdic acid containing carbon as a hetero atom.This heteropolyacid is stable and can be easily molded and its preparation is simple.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: October 13, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuichi Kudo, Go Kawamura, Akira Ishikawa
  • Patent number: 4645726
    Abstract: A compact, light-weight all solid state lithium battery is disclosed. The battery provides a good contact between a solid electrolyte and a Li anode by forming a Li alloy layer therebetween, even at the time of discharge at a large current density.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: February 24, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Hiratani, Katsuki Miyauchi, Yukio Ito, Keiichi Kanehori, Fumiyoshi Kirino, Tetsuichi Kudo
  • Patent number: 4634585
    Abstract: The present invention relates to a heteropoly acid containing carbon as a hetero atom. This heteropoly acid is useful as catalysts or starting materials for various reactions, color forming material or counter electrode material for electrochromic display element or the like.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: January 6, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuichi Kudo, Go Kawamura, Akira Ishikawa
  • Patent number: 4572873
    Abstract: The present invention relates to a titanium disulfide film fabricated on a substrate, where crystallites of titanium disulfide is oriented at an angle of their c-axis to the substrate surface of not more than 45.degree., and to a process for fabricating the film, where the film is prepared by chemical vapor deposition from TiCl.sub.4 and H.sub.2 S as source gases under an inner pressure of reaction tube of 30 kPa or less.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: February 25, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Keiichi Kanehori, Katsuki Miyauchi, Tetsuichi Kudo
  • Patent number: 4555456
    Abstract: A cathode structure for a thin film battery in which a titanium oxide layer is disposed on a substrate and has a titanium disulfide thin film disposed thereon. The cathode structure exhibits an excellent performance when applied to a lithium battery, a sodium battery, etc.
    Type: Grant
    Filed: May 22, 1984
    Date of Patent: November 26, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Keiichi Kanehori, Katsuki Miyauchi, Yukio Ito, Fumiyoshi Kirino, Tetsuichi Kudo
  • Patent number: 4539660
    Abstract: A nonvolatile memory in which at least one power supply element is carried with an integrated circuit chip containing the memory and connected to power supply terminals of the integrated circuit chip having a memory cell array in which a plurality of memory elements or memory circuits are arrayed.
    Type: Grant
    Filed: December 16, 1981
    Date of Patent: September 3, 1985
    Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.
    Inventors: Katsuki Miyauchi, Tetsuichi Kudo, Osamu Minato, Toshiaki Masuhara, Yoshio Uetani
  • Patent number: 4474686
    Abstract: The invention relates to a lithium oxide-based amorphous ionic conductor which is a ternary composition consisting of Li.sub.2 O, SiO.sub.2 and ZrO.sub.2, said composition having a composition of components falling within the range of a quadrilateral defined by two lines corresponding to the Li.sub.2 O contents of 80% and 50%, respectively, and by two lines which pass the apex of Li.sub.2 O and on which a ratio SiO.sub.2 :ZrO.sub.2 is 100:0.5 and 1:9, respectively. The conductor is used as a solid electrolyte in the form of a high ionic conductive amorphous thin film.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: October 2, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Katsuki Miyauchi, Keiichi Kanehori, Tetsuichi Kudo
  • Patent number: 4457987
    Abstract: A liquid fuel cell including an anode made of carbon powders, which contains therein an electrode catalyzer and is adapted to be supplied with a liquid fuel, a cathode supplied with oxygen, and a separator interposed between the anode and the cathode. In order to improve cell performance, the anode is formed from carbon powders bonded with a binder, the carbon powders having particle sizes passing through a 50 Tyler mesh screen, in which at least thirty percent by volume of the carbon powders are unable to pass through a 100 Tyler mesh screen.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: July 3, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuo Horiba, Seizi Takeuchi, Kohki Tamura, Go Kawamura, Tetsuichi Kudo
  • Patent number: 4414182
    Abstract: Hydrogen is generated by contacting an alkaline aqueous solution of formaldehyde with at least one catalyst selected from the group consisting of molybdenum, tungsten, molybdenum carbides, tungsten carbides, molybdenum nitrides, tungstenum borides, copper, silver, gold and compounds of copper, silver and gold.Hydrogen can be generated at ambient temperature under atmospheric pressure and, therefore, complicated steps or complicated devices are unnecessary.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: November 8, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Okamoto, Tetsuichi Kudo, Go Kawamura
  • Patent number: 4411971
    Abstract: This invention relates to lithium compounds composed of a lithium halide and lithium imide. The compounds are high in lithium ionic conductivity and are used as solid electrolytes. Particularly excellent ones of the lithium compounds are those represented by the general formula:yLi.sub.2 NH.(1-y)LiXwhere X represents Cl, Br or I and y denotes the molar fraction of lithium imide ranging from about 0.35 to about 0.98 when X is chlorine, from about 0.25 to about 0.35 when X is bromine or from about 0.33 to about 0.75 when X is iodine.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: October 25, 1983
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Akira Gotoh, Hidehito Obayashi, Ryo Nagai, Shouji Mochizuki, Tetsuichi Kudo
  • Patent number: 4367269
    Abstract: A lithium-ionic-conductive solid electrolyte consisting of lithium iodide and lithium nitride. It has the feature that the lithium ionic conductivity is higher than in prior-art solid electrolytes, and such feature becomes more remarkable when lithium hydroxide is added.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: January 4, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Ryo Nagai, Hidehito Obayashi, Akira Gotoh, Tetsuichi Kudo
  • Patent number: 4262063
    Abstract: A fuel cell using an electrolyte-soluble fuel in which a solid film exhibiting a hydrogen ion- and/or hydronium ion-conducitivty is provided on the surface of an air electrode close to an electrolyte containing the fuel is disclosed.The solid film transmits hydrogen ions and hydronium ions, but it does not transmit water and oxygen in substance. Therefore, the leakage of electrolyte and the variation of the composition ratio of the electrolyte are not feared, so that the fuel cell can be used for a long time.
    Type: Grant
    Filed: May 22, 1979
    Date of Patent: April 14, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuichi Kudo, Go Kikuchi, Hidehito Obayashi, Kohki Tamura