Patents by Inventor Tadashi Hatayama

Tadashi Hatayama 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).

  • Carbon fiber precursor acrylic fiber, carbon fiber, and method for producing same
    Patent number: 11959197
    Abstract: A first aspect of the present invention is carbon fiber wherein the surface of a monofilament has a center line average roughness Ra of 6.0 nm or more and 13 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. A second aspect of the present invention is carbon fiber precursor acrylic fiber wherein the surface of a monofilament has a center line average roughness Ra of 18 nm or more and 27 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. The carbon fiber according to the first aspect is obtained by stabilizing and carbonizing under specific conditions the carbon fiber precursor acrylic fiber according to the second aspect.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: April 16, 2024
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Naomasa Matsuyama, Yuutarou Nakamura, Norifumi Hirota, Hiroko Matsumura, Katsuhiko Ikeda, Kouki Wakabayashi, Tadashi Ootani, Akihiro Itou, Kenji Hirano, Akito Hatayama, Kenji Kaneta, Atsushi Nakajima
  • Method of manufacturing and using vibration-damping material
    Patent number: 5895538
    Abstract: A truss type extruded aluminum section is formed of a pair of planar plates and ribs, wherein hollow portions are formed within said section by the ribs and the planar plates. Vibration-damping resin is provided on the inner surfaces of hollow portions, and particularly on the inner surface of the planar plate and on a single surface of the inclined rib. With this arrangement, the vibration energy bending the planar plate and the rib is converted into a heat energy. In the case of manufacturing such truss type extruded aluminum vibration-damping section, for making easy the insertion of the vibration-damping resin in the hollow portion, the vibration-damping resin is stuck on a plastic film to form a long planar body. The plastic film serves as a cover or an adhesive. Moreover, in the case of directly inserting the vibration-damping resin sheet, the vibration-damping resin sheet is subjected to embossing on the adhesive-bonding side for allowing air to escape.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: April 20, 1999
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Tadashi Hatayama, Ichiro Yamagiwa, Kenshi Maekawa, Kenji Iwai, Toshimitsu Tanaka, Mamoru Taniuchi, Reiji Sanuki, Isamu Ueki, Toshihiko Sasaki, Akio Sugimoto, Kazuhisa Fujisawa
  • Vibration-damping material, its manufacturing method, and structural section for transport vehicle
    Patent number: 5690035
    Abstract: A truss type extruded aluminum section (1) is formed of a pair of planar plates (2)(3) and ribs (4)(5)(6), wherein hollow portions (7)(8)(9) are formed within the section (1) by the ribs (4)(5)(6) and the planar plates (2)(3). Vibration-damping resin is provided on the inner surfaces of hollow portions (7)(8)(9), and particularly on the inner surface of the planar plate (3) and on a single surface of the inclined rib (4). With this arrangement, the vibration energy bending the planar plate (3) and the rib (4) is converted into a heat energy. In the case of manufacturing such truss type extruded aluminum vibration-damping section (1), for making easy the insertion of the vibration-damping resin in the hollow portion, the vibration-damping resin is stuck on a plastic film (11) to form a long planar body. The plastic film (11) serves as a cover or an adhesive.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: November 25, 1997
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Tadashi Hatayama, Ichiro Yamagiwa, Kenshi Maekawa, Kenji Iwai, Toshimitsu Tanaka, Mamoru Taniuchi, Reiji Sanuki, Isamu Ueki, Toshihiko Sasaki, Akio Sugimoto, Kazuhisa Fujisawa