Patents Assigned to Fuji Fire-Proof Material Industry Co., Ltd.
  • Process for producing a fire-resistant, light-weight construction material
    Patent number: 4812169
    Abstract: A fire-resistant, light weight construction material is prepared by subjecting fly ash and/or paper sludge incineration ash to a swelling treatment with a mineral acid to prepare a slurry; and kneading, shaping and hardening the slurry.
    Type: Grant
    Filed: June 9, 1987
    Date of Patent: March 14, 1989
    Assignee: Fuji Fire-Proof Material Industry Co., Ltd.
    Inventors: Sadaji Matsuura, Yasuo Arai, Shigeki Aoki, Satoru Ando
  • Process for producing a hardened product of coal ash
    Patent number: 4622071
    Abstract: A hardened product of coal ash having strength sufficient as a civil engineering or construction material is obtained by treating coal ash with sulfuric acid and/or hydrochloric acid to obtain a first reaction mixture; treating the first reaction mixture with calcium carbonate to obtain a second reaction mixture; mixing the second reaction mixture with a hydraulic material and water to obtain a third reaction mixture; and shaping and curing the third reaction mixture.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: November 11, 1986
    Assignee: Fuji Fire-Proof Material Industry Co., Ltd.
    Inventors: Sadaji Matsuura, Satoru Ando, Masamitsu Kiso
  • Process for producing a fire-resistant, light-weight construction board
    Patent number: 4586958
    Abstract: A fire-resistant and light-weight construction board is prepared by treating fly ash and/or paper sludge incineration ash to a swelling treatment with a mineral acid and shaping and hardening the resultant mixture.
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: May 6, 1986
    Assignee: Fuji Fire-Proof Material Industry Co., Ltd.
    Inventors: Sadaji Matsuura, Yasuo Arai, Shigeki Aoki, Satoru Ando