Patents by Inventor Shigeharu Akatsuka

Shigeharu Akatsuka 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 manufacturing a pressure vessel for growing single crystals
    Patent number: 9926642
    Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: March 27, 2018
    Assignees: FURUYA METAL CO., LTD., MITSUBISHI CHEMICAL CORPORATION, THE JAPAN STEEL WORKS, LTD.
    Inventors: Yuji Sasagawa, Osamu Wakao, Yoshihiko Yamamura, Shigeharu Akatsuka, Keiichiro Matsushita
  • Pressure vessel for growing single crystals
    Patent number: 9127372
    Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: September 8, 2015
    Assignees: THE JAPAN STEEL WORKS, LTD., MITSUBISHI CHEMICAL CORPORATION, FURUYA METAL CO., LTD.
    Inventors: Yuji Sasagawa, Osamu Wakao, Yoshihiko Yamamura, Shigeharu Akatsuka, Keiichiro Matsushita
  • METHOD OF MANUFACTURING A PRESSURE VESSEL FOR GROWING SINGLE CRYSTALS
    Publication number: 20150182928
    Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.
    Type: Application
    Filed: March 13, 2015
    Publication date: July 2, 2015
    Applicants: FURUYA METAL CO., LTD., THE JAPAN STEEL WORKS, LTD., MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yuji SASAGAWA, Osamu WAKAO, Yoshihiko YAMAMURA, Shigeharu AKATSUKA, Keiichiro MATSUSHITA
  • PRESSURE VESSEL FOR GROWING SINGLE CRYSTALS
    Publication number: 20090013926
    Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.
    Type: Application
    Filed: January 11, 2006
    Publication date: January 15, 2009
    Applicant: SOLVOTHERMAL CRYSTAL GROWTH TECHNOLOGY RESEARCH ALLIANCE
    Inventors: Yuji Sasagawa, Osamu Wakao, Yoshihiko Yamamura, Shigeharu Akatsuka, Keiichiro Matsushita