Patents by Inventor Keiichi Miwa

Keiichi Miwa 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: 7084181
    Abstract: The present invention treats crushed pieces of a nonmetallic honeycomb panel together with a process water under high-temperature and high-pressure for a predetermined time so as to separate components. Water or alkali-added water is used as process water. The method comprises a first process for treating the crushed pieces for a predetermined time with the water heated and pressurized to a subcritical range to hydrolyze aromatic polyamide, and a second process for treating the same with the water heated and pressurized to a supercritical range, wherein the aromatic polyamide is hydrolyzed and separated in the first process, and dehalogenation is carried out in the second process.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: August 1, 2006
    Assignees: Jamco Corporation, Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Toru Kasai, Shuntaro Kuriyama, Masatada Yamashita, Keiichi Miwa
  • Publication number: 20040097776
    Abstract: The present invention treats crushed pieces of a nonmetallic honeycomb panel together with a process water under high-temperature and high-pressure for a predetermined time so as to separate components. Water or alkali-added water is used as process water. The method comprises a first process for treating the crushed pieces for a predetermined time with the water heated and pressurized to a subcritical range to hydrolyze aromatic polyamide, and a second process for treating the same with the water heated and pressurized to a supercritical range, wherein the aromatic polyamide is hydrolyzed and separated in the first process, and dehalogenation is carried out in the second process.
    Type: Application
    Filed: September 26, 2003
    Publication date: May 20, 2004
    Applicants: JAMCO CORPORATION, ISHIKAWAJIMA-HARIMA JUKOGYO KABUSHIKI KAISHA
    Inventors: Toru Kasai, Shuntaro Kuriyama, Masatada Yamashita, Keiichi Miwa
  • Patent number: 3974467
    Abstract: A long flexible waveguide is fabricated by corrugating a thin-walled tube circular in section and then molding the corrugated tube so as to make the shape of its section substantially rectangular. The long flexible waveguide has a substantially rectangular section wherein a corrugating pitch P falls within a range of .lambda..sub.g /10<P<2 K.sqroot.D.sup.. t where .lambda..sub.g denotes a wavelength in the waveguide, K a constant, D an outer diameter of the tube before the corrugation, and t a thickness of the wall of said tube, and wherein a radius of curvature R of each inside corner of the molded tube falls within a range of h .ltoreq.R .ltoreq.0.46 b where h denotes a depth of the corrugate form of said tube, and b a dimension of said tube on the side of a minor axis of said section. Rectangular waveguide thus fabricated has excellent electric characteristics and is produced under good working conditions.
    Type: Grant
    Filed: May 29, 1975
    Date of Patent: August 10, 1976
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Susumu Tobita, Masashi Shimoishizaka, Isamu Oishi, Keiichi Miwa, Hideo Kanda