Patents by Inventor Yukichi Watanabe

Yukichi Watanabe 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).

  • Vibration-damping composite sheet steel
    Patent number: 5093204
    Abstract: A vibration-damping composite sheet steel made by sandwiching a viscoelastic material between two steel sheets. A rust proofing coating which generates no gaseous matter is formed on one surface of each of the steel sheets which is contacted with the viscoelastic material. The coating is a phosphate coating having no water of crystallization with a coating weight per unit area of 0.5 g/m.sup.2 or over, or a galvanized zinc coating including no zinc oxide.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: March 3, 1992
    Assignees: Nippon Kokan Kabushiki Kaisha, Mazda Motor Corporation
    Inventors: Yukichi Watanabe, Tomeji Doi, Masafumi Yoshida, Hidekazu Tsubone, Norio Chiba, Kunio Kawasaki, Masahiro Dohi, Hiroshi Kodama, Yoshitaka Takamiya
  • Vibration-damping composite metal plate
    Patent number: 4740427
    Abstract: A vibration-damping resin composition of the invention comprises 10 to 95% by weight of an amorphous thermoplastic resin polymer (a) and 90 to 5% by weight of a crystalline thermoplastic polymer (b) incompatible with the polymer (a). The polymer (a) has a glass transition temperature lower than that of the polymer (b) and a maximum tan.delta. of 0.5 or more within a predetermined temperature and frequency range. The polymer (b) has a melting point higher than the glass transition temperature of the polymer (a) and a shear storage modulus of 1.times.10.sup.8 dyne/cm.sup.2 or more at the temperature and frequency at which the polymer (a) exhibits the maximum tan.delta..
    Type: Grant
    Filed: May 15, 1986
    Date of Patent: April 26, 1988
    Assignees: Nippon Kokan Kabushiki Kaisha, Mitsubishi Petrochemical Company Limited
    Inventors: Masahide Ochiumi, Shinji Horie, Yukichi Watanabe, Norihiro Sekizuka, Akira Itsubo