Patents by Inventor Katsuhiko Ikeda
Katsuhiko Ikeda 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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Publication number: 20030207109Abstract: There is disclosed an acrylic fiber (a) consisting of an acrylonitrile polymer comprising an acrylonitrile unit in at least 80 wt % and less than 95 wt %, (b) having a monofilament dry strength of 2.5 to 4.0 cN/dtex, (c) having a monofilament dry elongation of 35 to 50%, and (d) forming a crack with a length of 20 &mgr;m or more in its tension rupture lateral surface along the filament axis direction when rupturing the monofilament in a tension test. The fiber has even orientation in its surface and inside; is significantly improved in dry strength, dry elongation and dyeability; and exhibits wool-like hand feeling. It is, therefore, quite suitable as a synthetic fiber for various applications such as a garment material, e.g., a sweater and a home furnishing material such as a pile.Type: ApplicationFiled: May 6, 2003Publication date: November 6, 2003Applicant: Mitsubishi Rayon co., Ltd.Inventors: Yukio Kasabo, Katsuhiko Ikeda, Yasuyuki Fujii, Yoshihiko Mishina, Ryo Ochi
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Patent number: 6641915Abstract: There is disclosed an acrylonitrile fiber bundle for a carbon fiber precursor with a total denier of 30,000 or more consisting of an acrylonitrile polymer comprising 95 wt % or more of an acrylonitrile unit, wherein the surface of filaments composing of the fiber bundle has 2 to 15 corrugation with a height of 0.5 to 1.0 &mgr;m which are substantially continuous in a longitudinal direction and an iodine adsorption per a fiber weight of the fiber bundle is 0.5 to 1.5 wt %. The fiber bundle shows a large total size, a small drying load owing to its good denseness and a good convergence so that it is suitably used as precursors for carbon fibers.Type: GrantFiled: November 12, 2002Date of Patent: November 4, 2003Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yukio Kasabo, Katsuhiko Ikeda
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Publication number: 20030203201Abstract: There is disclosed an acrylic fiber (a) consisting of an acrylonitrile polymer comprising an acrylonitrile unit in at least 80 wt % and less than 95 wt %, (b) having a monofilament dry strength of 2.5 to 4.0 cN/dtex, (c) having a monofilament dry elongation of 35 to 50%, and (d) forming a crack with a length of 20 &mgr;m or more in its tension rupture lateral surface along the filament axis direction when rupturing the monofilament in a tension test. The fiber has even orientation in its surface and inside; is significantly improved in dry strength, dry elongation and dyeability; and exhibits wool-like hand feeling. It is, therefore, quite suitable as a synthetic fiber for various applications such as a garment material, e.g., a sweater and a home furnishing material such as a pile.Type: ApplicationFiled: May 6, 2003Publication date: October 30, 2003Applicant: Mitsubishi Rayon co., Ltd.Inventors: Yokio Kasabo, Katsuhiko Ikeda, Yasuyuki Fujii, Yoshihiko Mishina, Ryo Ochi
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Patent number: 6610403Abstract: There is disclosed an acrylic fiber (a) consisting of an acrylonitrile polymer comprising an acrylonitrile unit in at least 80 wt % and less than 95 wt %, (b) having a monofilament dry strength of 2.5 to 4.0 cN/dtex, (c) having a monofilament dry elongation of 35 to 50%, and (d) forming a crack with a length of 20 &mgr;m or more in its tension rupture lateral surface along the filament axis direction when rupturing the monofilament in a tension test. The fiber has even orientation in its surface and inside; is significantly improved in dry strength, dry elongation and dyeability; and exhibits wool-like hand feeling. It is, therefore, quite suitable as a synthetic fiber for various applications such as a garment material, e.g., a sweater and a home furnishing material such as a pile.Type: GrantFiled: December 26, 2001Date of Patent: August 26, 2003Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yukio Kasabo, Katsuhiko Ikeda, Yasuyuki Fujii, Yoshihiko Mishina, Ryo Ochi
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Patent number: 6580707Abstract: The present invention aims at implementing acceleration of the hop-by-hop transfer without using a high-speed processor. In the present invention, a transfer destination searching circuit (12) constituted by hardware is provided in addition to a processor (11). In the transfer destination searching circuit (12), after header information has been extracted from received IP packet data, a content addressable memory (21) is first searched by using the header information as a key. If corresponding forwarding information cannot be obtained from the searching of the content addressable memory (21), HASH function searching is executed by employing an HASH searching pointer table (22). If the forwarding information is obtained from a forwarding table (23) as a result of these searching operations, the hop-by-hop transfer of the IP packet data is executed in accordance with the forwarding information.Type: GrantFiled: May 14, 1999Date of Patent: June 17, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Katsuhiko Ikeda, Kazuo Nogami
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Patent number: 6569523Abstract: The carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the ratio of the length and width of the fiber cross section of a monofilament (length/width) is 1.05 to 1.6, and the amount of Si measured by ICP (Inductively Coupled Plasma) atomic emission spectrometry is in the range of 500 to 4,000 ppm. This type of carbon fiber precursor fiber bundle has a high compactness, and the carbonizing processing ability is good. Furthermore, for the carbon fiber bundle which is to obtained hereafter, the resin impregnating ability and tow spreading ability are good, the strength increases, and it has bulkiness. Furthermore, the carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the liquid content ratio HW is 40 wt. % or more and less than 60 wt. %.Type: GrantFiled: November 14, 2002Date of Patent: May 27, 2003Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Ikeda, Masakazu Hoshino, Takayoshi Yamamoto, Aritaka Shimotashiro, Toshihiro Makishima, Masashi Okamoto
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Patent number: 6545611Abstract: A transmission apparatus with flexible structure for introducing external cables that controls signal transmission efficiently. A cable connector for introducing a cable from the outside is fixed on a sub-printed circuit board. A main printed circuit board has a guide rail along which the sub-printed circuit board can be inserted reversely to change the direction from which the cable is introduced at the time of the sub-printed circuit board being housed. An enclosure has ducts for bunching cables. Transmission units are mounted in the enclosure.Type: GrantFiled: September 14, 2001Date of Patent: April 8, 2003Assignee: Fujitsu LimitedInventors: Mitsuaki Hayashi, Toshiaki Asai, Hiroshi Kato, Kazuya Nishida, Katsuhiko Ikeda, Yoshiyuki Sato, Kazuo Fujita, Takaharu Izuno, Kazutaka Nakata, Kouichi Nakamura
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Publication number: 20030064221Abstract: The carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the ratio of the length and width of the fiber cross section of a monofilament (length/width) is 1.05 to 1.6, and the amount of Si measured by ICP (Inductively Coupled Plasma) atomic emission spectrometry is in the range of 500 to 4,000 ppm. This type of carbon fiber precursor fiber bundle has a high compactness, and the carbonizing processing ability is good. Furthermore, for the carbon fiber bundle which is to obtained hereafter, the resin impregnating ability and tow spreading ability are good, the strength increases, and it has bulkiness. Furthermore, the carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the liquid content ratio HW is 40 wt. % or more and less than 60 wt. %.Type: ApplicationFiled: November 14, 2002Publication date: April 3, 2003Applicant: Mitsubishi Rayon co., Ltd.Inventors: Katsuhiko Ikeda, Masakazu Hoshino, Takayoshi Yamamoto, Aritaka Shimotashiro, Toshihiro Makishima, Masashi Okamoto
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Patent number: 6503624Abstract: The carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the ratio of the length and width of the fiber cross section of a monofilament (length/width) is 1.05 to 1.6, and the amount of Si measured by ICP (Inductively Coupled Plasma) atomic emission spectrometry is in the range of 500 to 4,000 ppm. This type of carbon fiber precursor fiber bundle has a high compactness, and the carbonizing processing ability is good. Furthermore, for the carbon fiber bundle which is to obtained hereafter, the resin impregnating ability and tow spreading ability are good, the strength increases, and it has bulkiness. Furthermore, the carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the liquid content ratio HW is 40 wt. % or more and less than 60 wt. %.Type: GrantFiled: June 22, 2001Date of Patent: January 7, 2003Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Ikeda, Masakazu Hoshino, Takayoshi Yamamoto, Aritaka Shimotashiro, Toshihiro Makishima, Masashi Okamoto
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Publication number: 20020145858Abstract: A transmission apparatus with flexible structure for introducing external cables that controls signal transmission efficiently. A cable connector for introducing a cable from the outside is fixed on a sub-printed circuit board. A main printed circuit board has a guide rail along which the sub-printed circuit board can be inserted reversely to change the direction from which the cable is introduced at the time of the sub-printed circuit board being housed. An enclosure has ducts for bunching cables. Transmission units are mounted in the enclosure.Type: ApplicationFiled: September 14, 2001Publication date: October 10, 2002Inventors: Mitsuaki Hayashi, Toshiaki Asai, Hiroshi Kato, Kazuya Nishida, Katsuhiko Ikeda, Yoshiyuki Sato, Kazuo Fujita, Takaharu Izuno, Kazutaka Nakata, Kouichi Nakamura
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Publication number: 20020041957Abstract: The carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the ratio of the length and width of the fiber cross section of a monofilament (length/width) is 1.05 to 1.6, and the amount of Si measured by ICP (Inductively Coupled Plasma) atomic emission spectrometry is in the range of 500 to 4,000 ppm. This type of carbon fiber precursor fiber bundle has a high compactness, and the carbonizing processing ability is good. Furthermore, for the carbon fiber bundle which is to obtained hereafter, the resin impregnating ability and tow spreading ability are good, the strength increases, and it has bulkiness. Furthermore, the carbon fiber precursor fiber bundle of the present invention is an acrylonitrile-based fiber bundle wherein the liquid content ratio HW is 40 wt. % or more and less than 60 wt. %.Type: ApplicationFiled: June 22, 2001Publication date: April 11, 2002Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Ikeda, Masakazu Hoshino, Takayoshi Yamamoto, Aritaka Shimotashiro, Toshihiro Makishima, Masashi Okamoto
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Patent number: 6245423Abstract: An acrylic fiber tow having a total size of at least 22,000 dtex and a weight variation ratio in the longitudinal direction of not greater than 3.5%, which is useful as a precursor for carbon fiber production.Type: GrantFiled: June 15, 2000Date of Patent: June 12, 2001Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Katsuhiko Ikeda, Toshihiro Makishima, Nobuyuki Fukuen
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Patent number: 4732497Abstract: A bearing device for an axle comprises a housing arranged about a portion of the axle, a pair of bearings each having a predetermined clearance mounted between the housing and the axle for rotation of the axle with respect to the housing; two opposed offset pairs of corresponding steps, including a first step of each pair on the outer periphery of the axle, and a second step of each pair on the inner periphery of the housing for positioning the bearings on the axle in the axial direction; and a clamping device for securing the bearings against axial movement on the axle beyond the predetermined clearance.Type: GrantFiled: October 10, 1986Date of Patent: March 22, 1988Assignee: Koyo Seiko Co., Ltd.Inventors: Shiro Sawa, Yoshihide Toda, Kenichi Horii, Katsuhiko Ikeda