Patents by Inventor Isao Yagi

Isao Yagi 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).

  • Demolition agent for demolishing brittle materials
    Patent number: 4477284
    Abstract: According to the present invention, a demolition agent for demolishing brittle materials is provided which comprises 30 to 90 parts by weight of a soft-burned quick lime powder having a crystal size of less than 10 microns and a specific surface area of 1,000 to 5,000 cm.sup.2 /g (Blaine) and 10 to 70 parts by weight of a hydraulic material, and further including, relative to 100 parts by weight of the mixture of the soft-burned quick lime and the hydraulic material, 0.5 to 15 parts by weight of a hydration retarder and 0.1 to 5 parts by weight of a water-reducing agent.
    Type: Grant
    Filed: December 7, 1982
    Date of Patent: October 16, 1984
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Jun Isogai, Seiichi Nakaya, Akira Saitou, Akio Takahashi, Isao Yagi