Patents by Inventor Akira Chudo

Akira Chudo 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).

  • Expansive solidifying material
    Patent number: 4266980
    Abstract: An expansive solidifying material which consists of gypsum, blast furnace slag and portland type cement as the main components and soluble aluminate as a hardening promoter. The expansive solidifying material of the invention is quite suitable for solidifying poor grounds containing much water and the solidifying material is quite excellent in the initial hardening, long term strength, water absorption, expansibility and the reduction of production cost.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: May 12, 1981
    Assignee: Osaka Cement Co., Ltd.
    Inventors: Akira Chudo, Tomomitsu Sugi, Kouji Kataoka