Patents by Inventor Naotaka Fumoto

Naotaka Fumoto 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).

  • REINFORCING METHOD OF SILICA GLASS SUBSTANCE AND REINFORCED SILICA GLASS CRUCIBLE
    Publication number: 20100192841
    Abstract: A process reinforcing a silica glass substance, such as a silica glass crucible, is provided without intermixing an impurity. The process comprises forming a silica glass powder layer on a surface of the silica glass substance, and crystallizing said silica glass powder layer under high temperature. As for a silica glass crucible, the process for reinforcing the silica glass crucible and the reinforced silica glass crucible are provided, wherein the silica glass powder layer on the whole or a part of the surface of the crucible is formed and then, crystallized under a temperature at the melting of a silicon raw material being charged into said quartz glass crucible.
    Type: Application
    Filed: April 13, 2010
    Publication date: August 5, 2010
    Applicant: JAPAN SUPER QUARTZ CORPORATION
    Inventors: Toshio TSUJIMOTO, Hiroya Ishizuka, Naotaka Fumoto
  • REINFORCING METHOD OF SILICA GLASS SUBSTANCE AND REINFORCED SILICA GLASS CRUCIBLE
    Publication number: 20080078207
    Abstract: A process reinforcing a silica glass substance, such as a silica glass crucible, is provided without intermixing an impurity. The process comprises forming a silica glass powder layer on a surface of the silica glass substance, and crystallizing said silica glass powder layer under high temperature. As for a silica glass crucible, the process for reinforcing the silica glass crucible and the reinforced silica glass crucible are provided, wherein the silica glass powder layer on the whole or a part of the surface of the crucible is formed and then, crystallized under a temperature at the melting of a silicon raw material being charged into said quartz glass crucible.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 3, 2008
    Applicant: JAPAN SUPER QUARTZ CORPORATION
    Inventors: Toshio Tsujimoto, Hiroya Ishizuka, Naotaka Fumoto
  • Reinforcing process of silica glass substance and reinforced silica glass crucible
    Publication number: 20040112274
    Abstract: A process reinforcing a silica glass substance, such as a silica glass crucible, is provided without intermixing an impurity. The process comprises forming a silica glass powder layer on a surface of the silica glass substance, and crystallizing said silica glass powder layer under high temperature. As for a silica glass crucible, the process for reinforcing the silica glass crucible and the reinforced silica glass crucible are provided, wherein the silica glass powder layer on the whole or a part of the surface of the crucible is formed and then, crystallized under a temperature at the melting of a silicon raw material being charged into said quartz glass crucible.
    Type: Application
    Filed: September 30, 2003
    Publication date: June 17, 2004
    Applicant: JAPAN SUPER QUARTZ CORPORATION
    Inventors: Toshio Tsujimoto, Hiroya Ishizuka, Naotaka Fumoto