Patents by Inventor Tsutomu Tahara

Tsutomu Tahara 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).

  • Process for producing aluminum nitride and aluminum nitride
    Patent number: 6986875
    Abstract: A process for producing aluminum nitride includes a step of holding an aluminum powder in a nitrogen atmosphere whose nitrogen gas pressure falls in a range of from 105 to 300 kPa, thereby developing a nitriding reaction at a temperature of from 500 to 1,000° C., wherein a reaction controller gas, controlling the development of the nitriding reaction, is supplied into a reactor chamber in which the aluminum powder is accommodated. In the production process, the reaction controller gas is included in the nitrogen atmosphere in the development of the nitriding reaction. Accordingly, the development of the nitriding reaction is controlled so that it is possible to develop the nitriding reaction at a lower temperature. As a result, it is possible to produce an aluminum nitride powder whose particle diameters are fine.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: January 17, 2006
    Assignee: Ibaragi Laboratory Co., Ltd.
    Inventors: Hirohisa Miura, Hirofumi Matunaga, Tsutomu Tahara
  • Process for producing aluminum nitride and aluminum nitride
    Publication number: 20030099590
    Abstract: A process for producing aluminum nitride includes a step of holding an aluminum powder in a nitrogen atmosphere whose nitrogen gas pressure falls in a range of from 105 to 300 kPa, thereby developing a nitriding reaction at a temperature of from 500 to 1,000° C., wherein a reaction controller gas, controlling the development of the nitriding reaction, is supplied into a reactor chamber in which the aluminum powder is accommodated. In the production process, the reaction controller gas is included in the nitrogen atmosphere in the development of the nitriding reaction. Accordingly, the development of the nitriding reaction is controlled so that it is possible to develop the nitriding reaction at a lower temperature. As a result, it is possible to produce an aluminum nitride powder whose particle diameters are fine.
    Type: Application
    Filed: November 7, 2002
    Publication date: May 29, 2003
    Applicant: IBARAGI LABORATORY CO., LTD.
    Inventors: Hirohisa Miura, Hirofumi Matunaga, Tsutomu Tahara