Patents by Inventor Yasuo Kitoh

Yasuo Kitoh 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).

  • Patent number: 7879150
    Abstract: A silicon carbide manufacturing device includes a graphite crucible, in which a seed crystal is disposed, a gas-inducing pipe coupled with the graphite crucible, and an attachment prevention apparatus. The gas-inducing pipe has a column-shaped hollow part, through which a source gas flows into the graphite crucible. The attachment prevention apparatus includes a rod extending to a flow direction of the source gas, and a revolving and rotating element for revolving the rod along an inner wall of the gas-inducing pipe while rotating the rod on an axis of the rod in parallel to the flow direction.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: February 1, 2011
    Assignee: DENSO CORPORATION
    Inventors: Masao Nagakubo, Fusao Hirose, Yasuo Kitoh
  • Publication number: 20080053371
    Abstract: A silicon carbide manufacturing device includes a graphite crucible, in which a seed crystal is disposed, a gas-inducing pipe coupled with the graphite crucible, and an attachment prevention apparatus. The gas-inducing pipe has a column-shaped hollow part, through which a source gas flows into the graphite crucible. The attachment prevention apparatus includes a rod extending to a flow direction of the source gas, and a revolving and rotating element for revolving the rod along an inner wall of the gas-inducing pipe while rotating the rod on an axis of the rod in parallel to the flow direction.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 6, 2008
    Applicant: DENSO CORPORATION
    Inventors: Masao Nagakubo, Fusao Hirose, Yasuo Kitoh
  • Patent number: 5895526
    Abstract: A process for growing a single crystal comprises providing a single crystal substrate acting as a seed crystal above a source material in a container, heating the source material in an inert gas atmosphere in the container to form a sublimed source material, and discharging the sublimed source material from the container through a port above the single crystal substrate, to cause the sublimed source material to flow along and in parallel with a surface of the single crystal substrate, and grow a single crystal on the surface of the single crystal substrate.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: April 20, 1999
    Assignee: Nippondenso Co., Ltd.
    Inventors: Yasuo Kitoh, Masahiko Suzuki, Naohiro Sugiyama