Patents by Inventor Etsuo Sakai

Etsuo Sakai 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 admixture and cement composition
    Patent number: 5192366
    Abstract: A cement admixture comprising a polymer latex and a water reducing agent as effective components, wherein the polymer latex comprises a copolymer of monomers comprising ethylene, vinyl acetate and an acrylic ester, and an emulsion stabilizer, said emulsion stabilizer being a surfactant.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: March 9, 1993
    Assignee: Denki Kagaku Koygo Kabushiki Kaisha
    Inventors: Asaaki Nishioka, Etsuo Sakai, Tomohiro Kaneko, Masaki Ogasawara
  • Hydraulic material composition having high strength
    Patent number: 4933013
    Abstract: This invention is directed to a hydraulic material composition having high strength. The composition contains a hydraulic material, an ultra-fine particle, a water reducing agent and water. The hydraulic material contains 0 to 16.5% by weight of an aluminate phase consisting essentially of 3CaO.Al.sub.2 O.sub.3 and 4CaO.Al.sub.2 O.sub.3.Fe.sub.2 O.sub.3.
    Type: Grant
    Filed: September 7, 1988
    Date of Patent: June 12, 1990
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Etsuo Sakai, Yukio Shibayama, Kazuhiro Kaizaki, Yasuhito Fushii
  • Hydraulic material composition having high strength
    Patent number: 4915740
    Abstract: A hydraulic material composition having high strength contains a hydraulic material containing as main ingredients an alkaline earth metal oxide and aluminum oxide (Al.sub.2 O.sub.3), ultra-fine particles having a mean particle size smaller by one order or more than that of the hydraulic material, a metal aggregate and a plasticizer.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: April 10, 1990
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Etsuo Sakai, Tutomu Kida, Yasuhito Fushii, Yukio Sasagawa
  • Mold assembly
    Patent number: 4708626
    Abstract: According to the invention, a mold assembly for molding an article is provided. The mold assembly is composed of at least male and female molds. At least one of the male and female molds is made of a hydraulic material composition having high strength containing a hydraulic material as a main ingredient. A molding face of at least one of the male and female molds is made of a substance other than the hydraulic material.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: November 24, 1987
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Etsuo Sakai, Asaaki Nishioka, Kiyosi Watanabe, Iwao Mino