Patents by Inventor Shunsuke Ohtsuka

Shunsuke Ohtsuka 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).

  • Method of preparing ultrafine particle dispersion material
    Patent number: 5279868
    Abstract: In the manufacture of ultrafine particles of semiconductor compound, pulse laser with high output is irradiated on an evaporation source having the same or similar composition as the above semiconductor compound to evaporate the source in a moment and the ultrafine particles of the semiconductor compound are produced utilizing the nuclear growth in inert gas. A process wherein a material for ultrafine particles is heated/evaporated by laser in inert gas and the resulting vapor is rapidly cooled by a collision with the inert gas whereby the resulting ultrafine particles of said material is sticked on a base plate and another process wherein a material for matrix is heated/evaporated by laser whereby the matrix is formed on the base plate are carried out alternately so that the ultrafine particles are homogeneously dispersed in the matrix to prepare the material wherein the ultrafine particles are dispersed.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: January 18, 1994
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Shunsuke Ohtsuka, Hisao Nagata, Ken Yamashita, Tadashi Koyama, Shuhei Tanaka