Patents by Inventor Hirose Takao

Hirose Takao 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).

  • Process for producing refractories
    Patent number: 4009308
    Abstract: A process for producing refractories wherein an impregnant is filled into open pores of the refractories. The impregnant is the thermoplastic resinous material which is obtained by removing a light fraction having a boiling point of less than 200.degree. C under a reduced pressure of 100 mmHg and having a benzene-insoluble fraction content of less than 10% by weight from at least one member selected from the group consisting of a heavy oil obtained by the steam cracking of petroleum and the polymerization product of said heavy oil. The slag penetration resistance, slag erosion resistance and slaking resistance of the impregnated refractories are improved thereby.
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: February 22, 1977
    Assignees: Shinagawa Refractories Co., Ltd., Nippon Oil Company Ltd.
    Inventors: Zenbutsu Tadashi, Asami Hajime, Uemura Seiichi, Hirose Takao