Patents by Inventor Hiroaki Yoshigai

Hiroaki Yoshigai 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).

  • Publication number: 20100222487
    Abstract: Inorganic hollow powder is provided having a high purity, an enhanced fineness and a high hollowness. Specifically, inorganic hollow powder is provided having an average particle diameter of 1 to 5 ?m, the maximum particle diameter of 20 ?m or less, a particle size distribution standard deviation of 3 ?m or less, and an average hollowness of 35 to 70 vol %. The inorganic hollow powder is obtained, for instance, by supplying, via an inorganic feed material powder supply pipe at a discharge rate of 80 m/s or more, inorganic raw material powder having a specific surface area of 500 m2/g or more and an average particle diameter of 7 ?m or less, into a flame formed by a burner comprising at least a triple pipe portion sequentially arranged with, in order from outside, a combustion supporting gas supply pipe, a combustible gas supply pipe and the inorganic feed material powder supply pipe.
    Type: Application
    Filed: March 8, 2007
    Publication date: September 2, 2010
    Applicant: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yasuhisa Nishi, Hiroaki Yoshigai, Mitsuyoshi Iwasa