Patents by Inventor Shigeoki Nishimura
Shigeoki Nishimura 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).
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Patent number: 6329099Abstract: A highly reliable sodium-sulfur battery includes a cell container for the positive electrode which is hardly deteriorated by corrosion. The cell container for the positive electrode is assembled by integrating plural members made of a high corrosion resistant alloy containing Cr, or a Co base alloy containing Cr, Ni and Mo, wherein carbide containing at least one of Cr, W and Mo is precipitated, and a readily deformable portion is provided to the cell container for the positive electrode, whereby reliability of the sodium-sulfur battery can be significantly improved.Type: GrantFiled: March 16, 1999Date of Patent: December 11, 2001Assignee: Hitachi, Ltd.Inventors: Tetsuo Oyama, Tadahiko Miyoshi, Manabu Madokoro, Hisamitsu Hatoh, Shigeoki Nishimura, Katsuhiko Shiota, Kiyoshi Otaka
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Patent number: 6245455Abstract: A sodium-sulfur battery in which sulfur and/or sodium polysulfide are used as cathode active materials, and an electronic conductor, which are arranged in a cathode chamber between a cathode container operating concurrently as a cathode electric collector and a solid electrolyte tube, and a layer, made of a material having a superior corrosion resistance against sulfur and sodium polysulfide, is provided between said solid electrolyte tube and said electronic conductor, wherein the cathode electric collector as the electronic conductor has been improved.Type: GrantFiled: July 6, 1998Date of Patent: June 12, 2001Assignee: Hitachi, Ltd.Inventors: Kazushige Kohno, Seizi Koike, Toshiya Doi, Tomoichi Kamo, Masaru Kadoshima, Kozo Sakamoto, Shigeoki Nishimura
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Patent number: 5962160Abstract: A highly reliable sodium-sulfur battery includes a cell container for the positive electrode which is hardly deteriorated by corrosion. The cell container for the positive electrode is made of a Co base alloy containing Cr, Ni, and Mo, wherein carbide containing at least one of Cr, W, and Mo is precipitated, or the cell container for positive electrode is assembled by integrating plural members made of a high corrosion resistance alloy containing Cr by welding, and a readily deformable portion is provided to the cell container for positive electrode, whereby the reliability of the sodium-sulfur battery can be significantly improved.Type: GrantFiled: July 16, 1996Date of Patent: October 5, 1999Assignee: Hitachi, Ltd.Inventors: Tetsuo Oyama, Tadahiko Miyoshi, Manabu Madokoro, Hisamitsu Hatoh, Shigeoki Nishimura, Katsuhiko Shiota, Kiyoshi Otaka
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Patent number: 5500292Abstract: The polymer electrolyte type hydrogen-oxygen fuel cell of the present invention comprises an oxygen electrode and a hydrogen electrode, a polymer electrolyte membrane provided between the oxygen electrode and hydrogen electrode and electron conductors provided on the side of the electrodes which is opposite to the electrolyte side and the oxygen electrode comprises a catalytically active component, a carrier for the catalytically active component and a binder and has such a gradient in water repellency across the thickness that the water repellency is highest in the area adjacent to the electrolyte and lowest in the area adjacent to the conductor. In this fuel cell, flooding of water at the interface between the oxygen electrode and the electrolyte can be prevented.Type: GrantFiled: July 11, 1994Date of Patent: March 19, 1996Assignee: Hitachi, Ltd.Inventors: Yasushi Muranaka, Jinichi Imahashi, Tatsuo Horiba, Shigeoki Nishimura
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Patent number: 4879192Abstract: A secondary cell comprises opposed positive and negative electrodes of polymers, each having conjugated double bonds, such as polyacetylene, poly-phenylene, polythienylene and polypyrrole, and an electrolyte solution comprising an electrolyte dissolved in a nitrile compound and being interposed between the two electrodes.Type: GrantFiled: September 20, 1984Date of Patent: November 7, 1989Assignees: Hitachi Ltd., Showa Denka K.K.Inventors: Shigeoki Nishimura, Kazunori Fujita, Hiroyuki Sugimoto, Atsuko Tohyama, Noboru Ebato, Shinpei Matsuda
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Patent number: 4559284Abstract: A secondary battery having at least one electrode made from a polymer having conjugated double bonds in a main chain such as polyacetylene can be improved remarkably in charge-discharge cycle life by making the electrode surface area of a negative electrode greater than that of a positive electrode.Type: GrantFiled: October 11, 1984Date of Patent: December 17, 1985Assignees: Showa Denko K.K., Hitachi, Ltd.Inventors: Shigeoki Nishimura, Kazunori Fujita, Hiroyuki Sugimoto, Atsuko Tohyama, Noboru Ebato, Shinpei Matsuda
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Patent number: 4518665Abstract: The present invention provides a sheet-shaped polymer secondary battery of layer built type which is a laminate of plurality of sheet-shaped unit cells each of which comprising the following elements (a) to (c):(a) a positive electrode made of a film-shaped polymer having conjugated double bonds and provided with a thin metal layer at one side of the surface of the film and capable of reversibly doping and undoping negative ions,(b) a negative electrode made of a film-shaped polymer having conjugated double bonds and provided with a thin metal layer at one side of the surface of the film and capable of reversibly doping and undoping positive ions, and(c) an insulating porous separator supporting a dopant-containing electrolyte and existing between the positive electrode and the negative electrode.Type: GrantFiled: October 20, 1983Date of Patent: May 21, 1985Assignees: Hitachi, Ltd., Showa Denko K.K.Inventors: Kazunori Fujita, Shigeoki Nishimura, Hiroyuki Sugimoto, Noboru Ebato, Shinpei Matsuda
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Patent number: 4389253Abstract: In discarding the used ion exchange resin by the demineralizer provided in the cooling system of an atomic reactor, the radioactivity-rich ion exchange resin and the radioactivity-rich crud can be treated separately by introducing 0.5% by weight of sodium hexamethaphosphate into a slurry of the ion exchange resin, irradiating supersonic of 20 to 60 kHz in frequency to the slurry of the ion exchange resin and removing the radioactive crud from the ion exchange resin.Type: GrantFiled: October 28, 1981Date of Patent: June 21, 1983Assignee: Hitachi, Ltd.Inventors: Shigeoki Nishimura, Toshio Ogawa, Katsuya Ebara, Sankichi Takahashi
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Patent number: 4220858Abstract: Sample water is introduced into a water bath in which aquatics live, and a gas sparingly soluble in water and giving no effect upon biological activities of aquatics is supplied to the water bath. The supplied gas and carbon dioxide gas generated by the biological activities of aquatics are collected, and a change in water quality of the sample water is detected from a concentration of carbon dioxide thus collected.Change in water quality of sample water can be rapidly detected thereby, which can be applied to detection of whether toxic materials are contained, for example, in river water flowing into a water purification plant, or not.Type: GrantFiled: February 8, 1978Date of Patent: September 2, 1980Assignee: Hitachi, Ltd.Inventors: Takashi Ikeguchi, Shunsuke Nogita, Kouji Otani, Shigeoki Nishimura
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Patent number: 4154673Abstract: Waste water issued from a wet type desulfurization apparatus and containing thionic acid ions is introduced into ion-exchange towers filled with weak-basic anion-exchange which has to effect anion exchange therein. The weak-basic anion-exchange resin which has adsorbed the thionic acid ions is desorbed by contacting an alkaline solution. The thionic acid ions included in the desorbing solution are decomposed by heating them in the presence of acid. A decomposed solution is issued out of the system after its neutralization.Type: GrantFiled: June 28, 1977Date of Patent: May 15, 1979Assignees: Hitachi, Ltd., Hitachi Plant Engineering & Construction Co., Ltd., Babcock-Hitachi K.K.Inventors: Kouji Otani, Shigeoki Nishimura, Toshio Sawa, Seiichi Kikkawa, Ikuo Shimokobe, Nobuo Yoshida, Kosaku Otsubo, Tsukasa Nishimura
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Patent number: 4028237Abstract: There are disclosed methods for removing fluorine values from fluorine-containing waste waters, in which aluminum ions are added to fluorine-containing waste water to convert fluorine to hydroxyfluoride complexes, adding phosphoric acid or phosphate and calcium compound are added to form fluoride apatite with residual fluorine in the waste water, and the hydroxy-fluoride complex and fluoride apatite are removed from the waste water.Type: GrantFiled: March 1, 1976Date of Patent: June 7, 1977Assignee: Hitachi, Ltd.Inventors: Shigeoki Nishimura, Toshio Sawa, Kouji Otani, Seiichi Kikkawa