Patents by Inventor Akira Dono

Akira Dono 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).

  • Sound absorbing materials
    Patent number: 5286929
    Abstract: A sound absorbing material comprises a fiber gathered body containing at least 50% by weight of synthetic fiber staples and having a mean density of 0.02-0.2 g/cm.sup.3, in which at least 30% by weight of irregular-shaped fibers having a particular sectional shape are contained in the fiber gathered body.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: February 15, 1994
    Assignees: Nissan Motor Co., Ltd., Kanebo Ltd.
    Inventors: Shigenori Kazama, Hiroshi Sugawara, Yugoro Masuda, Akira Dono
  • Polymer containing amorphous aluminosilicate particles and process for producing the same
    Patent number: 4959268
    Abstract: A polymer which contains amorphous aluminosilicate particles holding metal ions having a bactericidal action is physically stable and enables an ideal antibacterial or bactericidal action by the antibacterial metal ion in an excited state. The polymer is produced by mixing an organic polymer with said amorphous aluminosilicate solid particles before the polymer is molded. Alternatively, the polymer is produced by molding an organic polymer containing amorphous aluminosilicate solid particles, and treating the molded organic polymer with a solution of a water-soluble salt of a metal having a bactericidal action, thereby allowing the metal ions to be held on at least some of the amorphous aluminosilicate solid particles.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: September 25, 1990
    Assignees: Zenji Hagiwara, Kanebo Ltd.
    Inventors: Zenji Hagiwara, Satoshi Ando, Kunio Ichihashi, Akira Dono