Patents by Inventor Shunji Oishi

Shunji Oishi 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).

  • Magnesium hydroxide particles, method of the production thereof, and resin composition containing the same
    Patent number: 7060246
    Abstract: Provided are magnesium hydroxide particles having a hexagonal crystal form and having an aspect ratio (H) which satisfies the following expression (I), 0.45·A·B<H<1.1·A·B??(I) (wherein H is an aspect ratio, A is an average secondary particle diameter (?m) of all of the particles measured by a laser diffraction scattering method and B is a specific surface area (m2/g) of all of the particles measured by a BET method), a flame-retardant comprising the particles, a flame-retardant resin composition comprising 100 parts by weight of a synthetic resin and a 5 to 300 parts by weight of the magnesium hydroxide particles, and a molded article therefrom. The magnesium hydroxide particles are hexagonal single crystals, the hexagonal form thereof are not necessarily required to be regular hexagonal, and the size thereof are not necessarily constant.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: June 13, 2006
    Assignee: Kyowa Chemical Industry, Co., Ltd.
    Inventors: Shunji Oishi, Taro Ando, Makoto Yoshii, Wataru Hiraishi
  • Magnesium hydroxide particles, process for producing the same, and resin composition containing the particles
    Patent number: 6676920
    Abstract: Provided are magnesium hydroxide particles having a hexagonal crystal form and having an aspect ratio (H) which satisfies the following expression (I), 0.45·A·B<H<1.1·A·B  (I) (wherein H is an aspect ratio, A is an average secondary particle diameter (&mgr;m) of all of the particles measured by a laser diffraction scattering method and B is a specific surface area (m2/g) of all of the particles measured by a BET method), a flame-retardant comprising the particles, a flame-retardant resin composition comprising 100 parts by weight of a synthetic resin and a 5 to 300 parts by weight of the magnesium hydroxide particles, and a molded article therefrom. The magnesium hydroxide particles are hexagonal single crystals, the hexagonal form thereof are not necessarily required to be regular hexagonal, and the size thereof are not necessarily constant.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: January 13, 2004
    Assignee: Kyowa Chemical Industry Co., Ltd.
    Inventors: Shunji Oishi, Taro Ando, Makoto Yoshii, Wataru Hiraishi
  • Magnesium hydroxide particles, method of the production thereof, and resin composition containing the same
    Publication number: 20030235693
    Abstract: Provided are magnesium hydroxide particles having a hexagonal crystal form and having an aspect ratio (H) which satisfies the following expression (I),
    Type: Application
    Filed: July 28, 2003
    Publication date: December 25, 2003
    Inventors: Shunji Oishi, Taro Ando, Makto Yoshii, Wataru Hiraishi