Patents by Inventor Katsuji Ishibashi

Katsuji Ishibashi 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).

  • Activated carbon
    Patent number: 4118341
    Abstract: A method for the manufacture of an activated carbon by subjecting an acrylonitrile polymer to thermal condensation and activating the resultant condensation product and an activated carbon manufactured by said method. The activated carbon obtained is characterized by containing nitrogen in the molecular structure thereof and by having a high adsorbing capacity for mercaptan.
    Type: Grant
    Filed: April 5, 1977
    Date of Patent: October 3, 1978
    Assignee: Agency of Industrial Science & Technology
    Inventors: Katsuji Ishibashi, Shigeo Mitsui, Rikio Kobayashi