Patents by Inventor Kenkiti Hirano

Kenkiti Hirano 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).

  • Method for execution of quick hardening cement
    Patent number: 4082561
    Abstract: A method for working quick hardening cements comprising preparing (A) a composition comprising a cement paste, mortar or concrete and (B) a composition comprising a powder or suspension composition of calcium aluminate and inorganic sulfate, mixing the composition (A) and the composition (B) and quickly executing the mixture immediately after the admixture.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: April 4, 1978
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Koji Nakagawa, Kenkiti Hirano
  • Method for execution of quick hardening cement
    Patent number: 3973978
    Abstract: A method for working quick hardening cements comprising preparing (A) a composition comprising a cement paste, mortar or concrete and (B) a composition comprising a powder or suspension composition of calcium aluminate and inorganic sulfate, mixing the composition (A) and the composition (B) and quickly executing the mixture immediately after the admixture.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: August 10, 1976
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Koji Nakagawa, Kenkiti Hirano