Patents by Inventor Hidenobu Tatematsu

Hidenobu Tatematsu 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).

  • Cement-additive for inhibiting concrete-deterioration
    Patent number: 5435846
    Abstract: A cement additive for inhibiting concrete deterioration contains as an effective component a powder mixture of an inorganic cation exchanger, such as a highly calcium-substituted zeolite, and an inorganic anion exchanger, such as hydrocalumite. The cement additive inhibits the alkali-aggregate reaction and the corrosion of reinforcing steel, thereby protecting concrete constructions from deterioration.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: July 25, 1995
    Assignees: Nippon Chemical Industrial Co., Ltd., Railway Technical Research Institute
    Inventors: Hidenobu Tatematsu, Tohru Nakamura, Hitoshi Koshimizu, Toshihiko Morishita, Hideki Kotaki