Patents by Inventor Akira Dohno

Akira Dohno 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).

  • Stablized synthetic zeolite and a process for the preparation thereof
    Patent number: 5206195
    Abstract: Synthetic zeolite is stabilized to water by soaking it in a buffered acid solution for a prolonged time. The stabilized synthetic zeolite does not exhibit alkalinity when it is dispersed in water at room temperature for 24 hours or more, and exhibits improved flowability and almost constant ratios among Na, Al and O along the depth direction from the surface of the zeolite particles.
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: April 27, 1993
    Assignee: Kanebo Ltd.
    Inventors: Satoshi Ando, Kazuhiko Nakajima, Akira Dohno
  • Process for producing an antibacterial fiber article
    Patent number: 5064599
    Abstract: Zeolite particles retaining antibacterial metal ion, such as Ag, Cu or Zn ion, at ion-exchangeable sites of the zeolite are included in a low-melting component of conjugated fibers which comprise a low-melting component and a high-melting component. Upon heating, the low-melting component spreads to cause more zeolite particles to be exposed, which yields higher antibacterial activity in a fiber article produced from the conjugated fibers.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: November 12, 1991
    Assignees: Kanebo Limited, Hagiwara Giken Limited
    Inventors: Satoshi Ando, Akira Dohno, Zenji Hagiwara