Patents by Inventor Keizo Hatano

Keizo Hatano 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 and preparation thereof
    Patent number: 4082661
    Abstract: Activated carbon filtration materials are obtained by impregnating phenolic resins into inorganic porous bodies, such as ceramic filter tubes and plates, then baking the impregnated bodies to carbonize the resins. The invention also includes improved methods for purifying aqueous liquids contaminated with phenol, live bacilli, pyrogens, or water soluble organic dyes and a process for regenerating spent filters.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: April 4, 1978
    Assignee: Sumitomo Durez Company, Ltd.
    Inventors: Takao Aoki, Yuji Kako, Toyoji Kikuga, Keizo Hatano
  • Method of preparing shaped active carbon
    Patent number: 4051098
    Abstract: This invention relates to a process for manufacturing a shaped active carbon by using a one step phenol-formaldehyde resin, a modified phenol-formaldehyde resin or a mixture thereof as a binder. By this method, a shaped active carbon can be obtained having increased mechanical strength without deterioration of the adsorption capacity.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: September 27, 1977
    Assignees: Sumitomo Durez Company, Ltd., Daiichi Tanso Kogyo KK
    Inventors: Takeshi Takemura, Yoshihisa Katoh, Shigeyuki Kurita, Susumu Sasaki, Kyohei Funabiki, Keizo Hatano