Patents by Inventor Masao Katsuragi

Masao Katsuragi 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).

  • Porous inorganic product
    Patent number: 4104077
    Abstract: A porous inorganic product which is excellent in acoustic absorptivity and filtration efficiency and is high in strength is produced by bringing suitably sized organic foam particles, which have elasticity and can be shrunk greatly by heating or can be dissolved in a solvent, into contact with one another under pressure so as to deform each thereof, filling the gaps present between the organic foam particles with an inorganic binder such as cement, hardening the inorganic binder to form a hardened material, and shrinking the organic foam particles contained in the hardened material.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: August 1, 1978
    Assignees: The Yokohama Rubber Co., Ltd., Nihon Cement Co., Ltd., Asano Pole Co., Ltd.
    Inventors: Kazuaki Kobayashi, Noboru Takaha, Masao Katsuragi