Patents by Inventor Tadashi Matumoto

Tadashi Matumoto 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 of producing fiber-reinforced hardened body of gypsum system
    Patent number: 4146402
    Abstract: A process for producing a fiber-reinforced hardened body comprising mixing gypsum and slag in a ratio by weight of the former to the latter between 3:7 and 7:3 to prepare a main starting material, adding to the main starting material 1 - 30% by weight of reinforcing fiber, 0.1 - 5% by weight of alkali salt substance and 0.1 - 5% by weight of aluminum sulfate-containing substance, the respective amounts being based on the weight of the main starting material, further adding water to knead and mold the resulting starting material mixture, and curing the molded starting material mixture under normal condition or steam-curing the molded starting material mixture at 90.degree. C. or below.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: March 27, 1979
    Assignee: Mitsubishi Mining & Cement Company, Ltd.
    Inventors: Kinichi Kira, Yoshio Makino, Tadashi Matumoto, Yoshihiko Murata