Patents by Inventor Tsutomu Yoshitake
Tsutomu Yoshitake 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: 8882970Abstract: An apparatus for manufacturing carbon nanohorns includes a production chamber configured to irradiate a solid carbon material with a laser beam to produce a product containing carbon nanohorns; and a separation mechanism configured to separate the product produced in the production chamber into a lightweight component and a heavyweight component. The heavyweight component includes carbon nanohorn aggregate with high purity, and high-purity carbon nanotubes can be obtained by collecting the heavyweight component.Type: GrantFiled: April 19, 2007Date of Patent: November 11, 2014Assignees: NEC Corporation, Fuchita Nanotechnology Ltd.Inventors: Takeshi Azami, Daisuke Kasuya, Tsutomu Yoshitake, Yoshimi Kubo, Masako Yudasaka, Sumio Iijima, Eiji Fuchita
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Publication number: 20130037855Abstract: Provided is a Si—Ge laminated thin film including at least one Si layer and at least one Ge layer, which are alternately laminated on a substrate (1). A Si layer (31) and a Ge layer (22) each have a thickness in a range of 5 to 500 nm. The Si layer (31) is amorphous and only the Ge layer (22) is crystallized. An average crystallite size of Ge in the Ge layer (22) is 20 nm or less.Type: ApplicationFiled: March 25, 2011Publication date: February 14, 2013Applicant: NEC CORPORATIONInventors: Shoji Sekino, Shin Nakamura, Tsutomu Yoshitake, Akio Furukawa
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Patent number: 8236724Abstract: An adhesive layer 3 is disposed between a carbon particle 2 and a catalyst substance 1 of a catalyst-supporting particle for a fuel cell containing the carbon particle 2 and the catalyst substance 1. Thereby, the catalyst-supporting particle for fuel cell can be obtained in which a contact resistance between the catalyst substance and the carbon particle supporting the same is lower, and the aggregation of the catalyst substance is suppressed. A catalyst electrode for a fuel cell and the fuel cell using the above particle have a higher output power and an excellent durability.Type: GrantFiled: May 28, 2003Date of Patent: August 7, 2012Assignee: NEC CorporationInventors: Tsutomu Yoshitake, Shin Nakamura, Sadanori Kuroshima, Hidekazu Kimura, Hideto Imai, Yuichi Shimakawa, Takashi Manako, Yoshimi Kubo
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Patent number: 8003266Abstract: A fuel cell is provided which can supply the stable power and has higher reliability and a longer period of life without the influence of the circumstances and the operation conditions. An absorbent disposed near an oxidant electrode of a fuel cell including a fuel electrode and the oxidant electrode approaches to the vicinity of or is in contact with the oxidant electrode surface or departs from the oxidant electrode. Thereby, the absorbent removes moisture on the oxidant electrode so that the fuel cell which can supply the stable power with the higher reliability and the longer period of life can be provided.Type: GrantFiled: November 8, 2004Date of Patent: August 23, 2011Assignee: NEC CorporationInventors: Hiroshi Kajitani, Hidekazu Kimura, Takashi Manako, Tsutomu Yoshitake, Yoshimi Kubo
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Patent number: 7700211Abstract: An adhesion layer containing a second solid polymer electrolyte is disposed between a solid polymer electrolyte membrane and a fuel electrode and/or an oxidant electrode containing a first solid polymer electrolyte and a catalyst substance. The solid polymer electrolyte membrane and the adhesion layer are made of the same solid polymer electrolyte. In this manner, the adhesion at the interface between the electrode surface and the solid polymer electrolyte membrane is enhanced to implement the elevation of the cell characteristics and the elevation of the reliability of the cell.Type: GrantFiled: October 18, 2004Date of Patent: April 20, 2010Assignee: NEC CorporationInventors: Shin Nakamura, Yoshimi Kubo, Yuichi Shimakawa, Takashi Manako, Hidekazu Kimura, Hideto Imai, Sadanori Kuroshima, Tsutomu Yoshitake, Takeshi Obata
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Patent number: 7678485Abstract: The operability of a fuel cell which uses a fuel cartridge housing a liquid fuel is improved. A fuel cartridge 1400 houses a liquid fuel 124. The fuel cartridge 1400 includes a gas-liquid separation film 1408 which divides a fuel housing section 1402 into a liquid housing chamber 1402a and a gas housing chamber 1402b. A fuel gas, which is the vaporized liquid fuel, is housed in the gas housing chamber 1402b. A gas exhaust pipe 1410 is connected to the gas housing chamber 1402b, and the fuel gas housed in the gas housing chamber 1402b is discharged to outside the fuel cartridge 1400 via a gas discharge port 1414.Type: GrantFiled: December 6, 2004Date of Patent: March 16, 2010Assignee: NEC CorporationInventors: Yasutaka Kono, Yoshimi Kubo, Tsutomu Yoshitake, Takashi Manako, Hiroshi Kajitani, Hidekazu Kimura, Satoshi Nagao, Eiji Akiyama, Yoshinori Watanabe
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Patent number: 7655343Abstract: A fuel cell (100) which has an electrode-electrolyte joined article (101) composed of a fuel electrode (102), an oxidizing agent electrode (108) and, sandwiched thereby, a solid polymer electrolyte (114), characterized in that a separation film (330) comprising a material exhibiting an oxygen/nitrogen separation factor of more than 1 is provided on the surface of an oxidizing agent electrode side current collector (110) constituting the oxidizing agent electrode (108). The fuel cell is a liquid fuel supply type of fuel cell which has a simple structure and also is capable of supplying satisfactory oxygen to an oxidizing agent electrode.Type: GrantFiled: September 19, 2003Date of Patent: February 2, 2010Assignee: NEC CorporationInventors: Takeshi Obata, Tsutomu Yoshitake, Yoshimi Kubo
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Patent number: 7651804Abstract: A fuel cartridge in a fuel cell is constructed so as to be removably mounted to a fuel cell body. The fuel cartridge is constructed so that a high-concentration fuel tank and a mixing tank are detachably connected at a fitting section. A low-concentration fuel, a recovered fuel recovered from a fuel container, and a high-concentration fuel in the high-concentration fuel tank are mixed in the mixing tank to be a fuel at a predetermined concentration of fuel component, and then the fuel is supplied to the fuel container.Type: GrantFiled: November 8, 2004Date of Patent: January 26, 2010Assignee: NEC CorporationInventors: Hiroshi Kajitani, Hidekazu Kimura, Takashi Manako, Tsutomu Yoshitake, Yoshimi Kubo
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Patent number: 7645536Abstract: A fuel cell (100) is mounted with a fuel cartridge (1220) in a detachable manner. The fuel cartridge (1220) is provided with a connecting part (1225) and the fuel cell (100) is provided with a fitting part (1205) into which the connecting part (1225) is fitted. The fuel cell (100) identifies the fitted fuel cartridge (1220).Type: GrantFiled: November 18, 2004Date of Patent: January 12, 2010Assignee: NEC CorporationInventors: Eiji Akiyama, Yoshimi Kubo, Tsutomu Yoshitake, Takashi Manako, Hiroshi Kajitani, Hidekazu Kimura, Satoshi Nagao, Yoshinori Watanabe, Yasutaka Kono
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Publication number: 20090305096Abstract: A liquid fuel supply type fuel cell is provided in which water present in the oxidizer electrode is promptly removed and evaporated, thereby achieving high output. A fuel cell electrode and methods for manufacturing the same are also provided. In a fuel cell, a base material is provided with a hydrophobic layer on the surface in contact with a catalyst layer for discharging water promptly, and a hydrophilic layer from the hydrophobic layer towards the outside of the cell for evaporating water which has passed through the hydrophobic layer from the surface.Type: ApplicationFiled: August 13, 2009Publication date: December 10, 2009Inventors: Hidekazu Kimura, Tsutomu Yoshitake, Sadanori Kuroshima, Shin Nakamura, Yuichi Shimakawa, Takashi Manako, Hideto Imai, Suguru Watanabe, Yoshimi Kubo
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Publication number: 20090301861Abstract: An apparatus for manufacturing carbon nanohorns includes a production chamber configured to irradiate a solid carbon material with a laser beam to produce a product containing carbon nanohorns; and a separation mechanism configured to separate the product produced in the production chamber into a lightweight component and a heavyweight component. The heavyweight component includes carbon nanohorn aggregate with high purity, and high-purity carbon nanotubes can be obtained by collecting the heavyweight component.Type: ApplicationFiled: April 19, 2007Publication date: December 10, 2009Inventors: Takeshi Azami, Daisuke Kasuya, Tsutomu Yoshitake, Yoshimi Kubo, Masako Yudasaka, Sumio Iijima, Eiji Fuchita
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Patent number: 7618733Abstract: A fuel cell has a fuel electrode and an oxidizing agent electrode, a fuel supply path that supplies a liquid fuel to the fuel electrode, an oxidizing agent supply path that supplies an oxidizing agent to the oxidizing agent electrode, and an opening/closing member that, by changing its shape, opens and closes the oxidizing agent supply path. The change in the shape of the opening/closing member regulates the opening and closing of the oxidizing agent supply path.Type: GrantFiled: March 31, 2005Date of Patent: November 17, 2009Assignee: NEC CorporationInventors: Eiji Akiyama, Satoshi Tomoeda, Takashi Manako, Tsutomu Yoshitake, Yoshimi Kubo
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Publication number: 20090239114Abstract: A polymer electrolyte fuel cell which has a polymer electrolyte membrane, an anode disposed on one side of the polymer electrolyte membrane and a cathode disposed on the other side of the polymer electrolyte membrane, wherein an organic fuel is supplied to the anode, and wherein the anode has an anode catalyst layer containing a catalyst and a proton-conducting material, and the cathode has a cathode catalyst layer containing a catalyst, a proton-conducting material and an oxygen-permeating material.Type: ApplicationFiled: September 12, 2005Publication date: September 24, 2009Applicant: NEC CORPORATIONInventors: Yasutaka Kouno, Satoshi Tomoeda, Yoshimi Kubo, Tsutomu Yoshitake, Takeshi Obata
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Patent number: 7501024Abstract: A plume (109) is generated by irradiating a side face of a graphite rod (101) with a laser beam (103) to vaporize carbon. The vaporized carbon is introduced to a carbon nanohorn recovery chamber (119) through a recovery pipe (155), and the vaporized carbon is recovered as a carbon nanohorn assembly (117). A cooling tank (150) including liquid nitrogen (151) is arranged in the recovery pipe (155). While the cooling tank (150) controls the plume (109) at a low temperature, the cooling tank (150) cools the carbon vapor when the carbon vapor passes through the recovery pipe (155). The cooled carbon vapor is recovered as the carbon nanohorn assembly (117) which is controlled in the desired shape and dimensions.Type: GrantFiled: May 19, 2004Date of Patent: March 10, 2009Assignee: NEC CorporationInventors: Takeshi Azami, Daisuke Kasuya, Sumio Iijima, Tsutomu Yoshitake, Yoshimi Kubo, Masako Yudasaka
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Publication number: 20090061271Abstract: For the purpose of efficiently discharging CO2 generated therein while increasing the fuel utilization efficiency, a fuel cell comprises a solid polymer electrolyte membrane, a cathode arranged in contact with one side of the solid polymer electrolyte membrane, an anode arranged in contact with the other side of the solid polymer electrolyte membrane, a cathode collector and an anode collector respectively arranged in contact with the cathode and anode, a sealing member arranged in the rim of the solid polymer electrolyte membrane and sandwiched between the solid polymer electrolyte membrane and the anode collector, a fuel supply controlling membrane for vaporizing a liquid fuel and supplying the vaporized fuel to the anode, and a discharging unit for discharging a product produced by electrical reaction at the anode to the outside. An air vent formed in the sealing member serves as the discharging unit.Type: ApplicationFiled: May 1, 2006Publication date: March 5, 2009Applicant: NEC CORPORATIONInventors: Shouji Sekino, Kenji Kobayashi, Hideaki Sasaki, Takeshi Obata, Shin Nakamura, Tsutomu Yoshitake, Yoshimi Kubo
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Patent number: 7410720Abstract: An electrode sheet (489) is put in one side of a solid electrolyte membrane (114) at its cut portion. A base member (110) for an oxidant electrode side current collector electrode sheet (499) is placed at a location facing a base member (104) for the electrode sheet (489) formed on one face of the solid electrolyte membrane (114). In addition, the base member (104) for a fuel electrode side current collector electrode sheet (497) is placed at a location facing the base member (110) formed on the other face of the electrolyte film (114).Type: GrantFiled: August 17, 2005Date of Patent: August 12, 2008Assignee: NEC CorporationInventors: Tsutomu Yoshitake, Hidekazu Kimura, Takashi Manako, Ryota Yuge, Yoshimi Kubo
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Publication number: 20080176125Abstract: A fuel cell includes electrode sheets composed of an electrically conductive porous body composed by a sheet member having a framework having a three-dimensional mesh structure containing pores, a catalyst layer formed on one side thereof, and a resin portion integrally formed on an outer peripheral edge; the electrically conductive porous body has a current collection portion formed in a portion thereof having a laminated structure consisting of a plurality of sheet members, and the pores in each sheet member of the current collection portion are formed to be pressed flatter than the pores of other portions; a resin penetrates into pores within the electrically conductive porous body at bound portions of the resin portion and the electrically conductive porous body; and, among a plurality of unit cells A and B, at least a portion thereof are connected in series by means of an electrically conductive member that passes through an electrolyte membrane from the current collection portion of the electrically conType: ApplicationFiled: January 16, 2008Publication date: July 24, 2008Applicants: Mitsubishi Materials Corporation, NEC CorporationInventors: Eiko Kanda, Masahiro Wada, Komei Kato, Tsutomu Yoshitake, Hidekazu Kimura, Suguru Watanabe
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Publication number: 20070218340Abstract: A fuel cell has a fuel electrode and an oxidizing agent electrode, a fuel supply path that supplies a liquid fuel to the fuel electrode, an oxidizing agent supply path that supplies an oxidizing agent to the oxidizing agent electrode, and an opening/closing member that, by changing its shape, opens and closes the oxidizing agent supply path. The change in the shape of the opening/closing member regulates the opening and closing of the oxidizing agent supply path.Type: ApplicationFiled: March 31, 2005Publication date: September 20, 2007Inventors: Eiji Akiyama, Satoshi Tomoeda, Takashi Manako, Tsutomu Yoshitake, Yoshimi Kubo
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Publication number: 20070202382Abstract: Output properties of a fuel cell can be improved by using a single cell structure 1387 having an anode 102 and an oxidizing agent electrode 108 in both sides of a solid electrolyte membrane 114 and an evaporation inhibiting layer 1388 covering the surface of the cathode 108 which is not in contact with the solid electrolyte membrane 114.Type: ApplicationFiled: March 22, 2005Publication date: August 30, 2007Inventors: Shin Nakamura, Hideaki Sasaki, Shoji Sekino, Takeshi Obata, Tsutomu Yoshitake, Yoshimi Kubo, Kenji Kobayashi
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Publication number: 20070166595Abstract: A fuel cell (100) is mounted with a fuel cartridge (1220) in a detachable manner. The fuel cartridge (1220) is provided with a connecting part (1225) and the fuel cell (100) is provided with a fitting part (1205) into which the connecting part (1225) is fitted. The fuel cell (100) identifies the fitted fuel cartridge (1220).Type: ApplicationFiled: November 18, 2004Publication date: July 19, 2007Applicant: NEC CorporationInventors: Eiji Akiyama, Yoshimi Kubo, Tsutomu Yoshitake, Takashi Manako, Hiroshi Kajitani, Hidekazu Kimura, Satoshi Nagao, Yoshinori Watanabe, Yasutaka Kono