Patents by Inventor Akira Dohn

Akira Dohn 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).

  • Stabilized synthetic zeolite and a process for the preparation thereof
    Patent number: 5443812
    Abstract: Synthetic zeolite is stabilized to water by soaking it in an acid solution for a prolonged time. The stabilized synthetic zeolite does not exhibit alkalinity when it is dispersed in water at room temperature or elevated temperatures for 24 hours or more.
    Type: Grant
    Filed: January 7, 1993
    Date of Patent: August 22, 1995
    Assignee: Kanebo Ltd.
    Inventors: Kazuhiko Nakajima, Satoshi Ando, Akira Dohn, Hideo Yoshitome