Patents by Inventor Hiroyoshi Serizawa

Hiroyoshi Serizawa 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 producing a concrete product
    Patent number: 6126875
    Abstract: A process for producing a concrete product, which includes a step of preparing a primary concrete by mixing a super dry consistency concrete having a unit amount of water of at most 100 kg/cm.sup.3, a step of preparing a secondary concrete by weighing a suitable amount of the primary concrete and adding at least water, a water reducing agent and a setting accelerator thereto, followed by remixing, and a step of molding the secondary concrete in a formwork.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: October 3, 2000
    Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, Haneda Humepipe Co., Ltd.
    Inventors: Yoshiharu Watanabe, Hirotoshi Hagiwara, Tetsuo Shibata, Takashi Shimamura, Masaru Murase, Hiroyoshi Serizawa