Patents by Inventor Yoshihiko Hosako
Yoshihiko Hosako 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: 7297445Abstract: The present invention provides carbon fiber paper consisting of an organic high-molecular compound as a binder and carbon fibers, characterized in that the carbon fibers contain thin fibers with an average diameter smaller than 5 ?m and an average fiber length of 3 to 10 mm; a porous carbon electrode substrate for a fuel cell having a thickness of 0.05 to 0.5 mm and a bulk density of 0.3 to 0.8 g/cm3, also having a bending strength of 10 MPa or higher and a deflection of 1.5 mm or more at the time of bending, measured by a three-point bending test in conditions of using a sample width of 1 cm, a strain rate of 10 mm/min, and a distance between supporting points of 2 cm; and a method of producing a porous carbon electrode substrate for a fuel cell by impregnating the carbon fiber paper with a thermosetting resin, curing the thermosetting resin by heating and pressing treatment, and then carbonizing the paper.Type: GrantFiled: September 2, 2003Date of Patent: November 20, 2007Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Makoto Nakamura, Yoshihiko Hosako, Hidehiko Ohashi, Mitsuo Hamada, Kazushige Mihara
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Publication number: 20070166524Abstract: The present invention provides carbon fiber paper consisting of an organic high-molecular compound as a binder and carbon fibers, characterized in that the carbon fibers contain thin fibers with an average diameter smaller than 5 ?m and an average fiber length of 3 to 10 mm; a porous carbon electrode substrate for a fuel cell having a thickness of 0.05 to 0.5 mm and a bulk density of 0.3 to 0.8 g/cm3, also having a bending strength of 10 MPa or higher and a deflection of 1.5 mm or more at the time of bending, measured by a three-point bending test in conditions of using a sample width of 1 cm, a strain rate of 10 mm/min, and a distance between supporting points of 2 cm; and a method of producing a porous carbon electrode substrate for a fuel cell by impregnating the carbon fiber paper with a thermosetting resin, curing the thermosetting resin by heating and pressing treatment, and then carbonizing the paper.Type: ApplicationFiled: March 15, 2007Publication date: July 19, 2007Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Makoto Nakamura, Yoshihiko Hosako, Hidehiko Ohashi, Mitsuo Hamada, Kazushige Mihara
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Publication number: 20050100498Abstract: The present invention provides carbon fiber paper consisting of an organic high-molecular compound as a binder and carbon fibers, characterized in that the carbon fibers contain thin fibers with an average diameter smaller than 5 ?m and an average fiber length of 3 to 10 mm; a porous carbon electrode substrate for a fuel cell having a thickness of 0.05 to 0.5 mm and a bulk density of 0.3 to 0.8 g/cm3, also having a bending strength of 10 MPa or higher and a deflection of 1.5 mm or more at the time of bending, measured by a three-point bending test in conditions of using a sample width of 1 cm, a strain rate of 10 mm/min, and a distance between supporting points of 2 cm; and a method of producing a porous carbon electrode substrate for a fuel cell by impregnating the carbon fiber paper with a thermosetting resin, curing the thermosetting resin by heating and pressing treatment, and then carbonizing the paper.Type: ApplicationFiled: September 2, 2003Publication date: May 12, 2005Inventors: Makoto Nakamura, Yoshihiko Hosako, Hidehiko Ohashi, Mitsuo Hamada, Kazushige Mihara
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Patent number: 6713034Abstract: The present invention provides carbon fiber paper consisting of an organic high-molecular compound as a binder and carbon fibers, characterized in that the carbon fibers contain thin fibers with an average diameter smaller than 5 &mgr;m and an average fiber length of 3 to 10 mm; a porous carbon electrode substrate for a fuel cell having a thickness of 0.05 to 0.5 mm and a bulk density of 0.3 to 0.8 g/cm3, also having a bending strength of 10 MPa or higher and a deflection of 1.5 mm or more at the time of bending, measured by a three-point bending test in conditions of using a sample width of 1 cm, a strain rate of 10 mm/min, and a distance between supporting points of 2 cm; and a method of producing a porous carbon electrode substrate for a fuel cell by impregnating the carbon fiber paper with a thermosetting resin, curing the thermosetting resin by heating and pressing treatment, and then carbonizing the paper.Type: GrantFiled: April 11, 2001Date of Patent: March 30, 2004Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Makoto Nakamura, Yoshihiko Hosako, Hidehiko Ohashi, Mitsuo Hamada, Kazushige Mihara
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Publication number: 20020175073Abstract: The present invention provides carbon fiber paper consisting of an organic high-molecular compound as a binder and carbon fibers, characterized in that the carbon fibers contain thin fibers with an average diameter smaller than 5 &mgr;m and an average fiber length of 3 to 10 mm; a porous carbon electrode substrate for a fuel cell having a thickness of 0.05 to 0.5 mm and a bulk density of 0.3 to 0.8 g/cm3 also having a bending strength of 10 MPa or higher and a deflection of 1.5 mm or more at the time of bending, measured by a three-point bending test in conditions of using a sample width of 1 cm, a strain rate of 10 mm/min, and a distance between supporting points of 2 cm; and a method of producing a porous carbon electrode substrate for a fuel cell by impregnating the carbon fiber paper with a thermosetting resin, curing the thermosetting resin by heating and pressing treatment, and then carbonizing the paper.Type: ApplicationFiled: April 11, 2001Publication date: November 28, 2002Inventors: Makoto Nakamura, Yoshihiko Hosako, Hidehiko Ohashi, Mitsuo Hamada, Kazushige Mihara
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Patent number: 6392867Abstract: An electric double layer capacitor containing a polymer gel electrolyte layer provided between polarizable electrodes, wherein the polymer gel electrolyte layer contains a nonaqueous electrolytic solution, and a fibrous sheet material containing mainly a fiber or pulp material capable of forming a polymer gel with the nonaqueous electrolytic solution.Type: GrantFiled: January 3, 2001Date of Patent: May 21, 2002Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Teruyuki Yamada, Yoshihiko Hosako, Mitsuo Hamada, Tomoyoshi Chiba
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Patent number: 6326451Abstract: This invention relates to an acrylonitrile-based precursor fiber for the formation of a carbon fiber which is obtained by spinning an acrylonitrile-based copolymer (which contains not less than 90% by weight of acrylonitrile units as monomeric components, contains 5.0×10−5 to 2.0×10−4 equivalent/g of carboxylic acid groups and not less than 0.5×10−5 equivalent/g of sulfate groups and/or sulfonic groups, and has protons and/or ammonium ions as counter ions to the carboxylic acid groups, sulfate groups and sulfonic groups) and treating the resulting coagulated filament, wherein the amount of iodine adsorbable to the acrylonitrile-based precursor fiber is not greater than 0.8% by weight based on the weight of the fiber. By using this precursor fiber, a carbon fiber having a high strength and a high elastic modulus can be easily formed.Type: GrantFiled: February 25, 2000Date of Patent: December 4, 2001Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Mitsuo Hamada, Yoshihiko Hosako, Teruyuki Yamada, Tatsuzi Shimizu
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Patent number: 6248267Abstract: The present invention provides fibril system fibers which may be employed in filter applications and in artificial leather applications, and also provides an industrially superior manufacturing method for such fibril system fibers, and a spinning nozzle. The fibril fibers of the present invention include at least one macromolecular polymer having a film forming ability, and they have a structure in which fibrillated fibers having a diameter of 10 micrometers or less branch from main fibers having a width within a range of 0.1 micrometers-500 micrometers, and a length within a range of 10 micrometers-10 cm.Type: GrantFiled: August 27, 1998Date of Patent: June 19, 2001Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yoshihiko Hosako, Teruyuki Yamada, Katsuhiko Shinada, Hideaki Habara, Shigeki Ogawa, Sadatoshi Nagamine, Keiji Hirota, Takashi Kozakura
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Patent number: 6114068Abstract: The present invention provides a unique fibrous sheet for forming a polymer gel electrolyte having ion conductivity, a unique polymer gel electrolyte using such a sheet, and a unique method for the manufacture thereof. More specifically, the present invention provides a unique fibrous sheet for forming a polymer gel electrolyte having excellent ion conductivity and suitable as an electrolyte for various electronic devices such as lithium primary batteries, lithium secondary batteries, and electric double layer capacitors, as well as a unique polymer gel electrolyte using such a sheet, and also a unique method for the manufacture thereof.Type: GrantFiled: May 6, 1998Date of Patent: September 5, 2000Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Teruyuki Yamada, Seiji Hayashi, Yoshihiko Hosako, Mitsuo Hamada
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Patent number: 5202183Abstract: An alkali resistant synthetic fiber and a sheeting obtained therefrom are disclosed, the fiber being comprised of a polymer mixture consisting of (A) from 15 to 80% by weight of polysulphone, (B) from 20 to 85% by weight of polyvinyl chloride having a degree of polymerization of from 800 to 2,500, and (C) up to 65% by weight of other vinyl polymer, each based on the total weight of the components (A), (B), and (C). The sheeting is excellent in alkali resistant in high temperatures and liquid retention and is therefore useful as industrial filters, battery separators, and industrial wipers.Type: GrantFiled: May 28, 1991Date of Patent: April 13, 1993Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yoshihiko Hosako, Yoshifumi Furutani, Takashi Tabuchi, Yasushi Yamaguchi