Patents by Inventor Eiji Komada

Eiji Komada 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 manufacturing concrete articles of improved initial strength and long-term strength
    Patent number: 4102962
    Abstract: A process for manufacturing concrete articles of improved initial strength and long-term strength from a hydraulic cement composition capable of forming predominantly tobermorite group crystalline calcium silicate hydrate is provided. The hydraulic cement composition, having incorporated therein specified amounts of alumina cement and calcium hydroxide and/or oxide, is initially set in a mold and after the concrete so formed is allowed to stand at a temperature of not higher than approximately 40.degree. C for a period of 2 hours to 5 days, the concrete is finally cured at an elevated temperature and pressure.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: July 25, 1978
    Assignees: Showa Denko K.K., Misawa Homes Institute of Research and Development
    Inventors: Fumio Matsui, Shigeo Hayashi, Eiji Komada