Patents by Inventor Keizo Harada

Keizo Harada 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: 5051398
    Abstract: In a process for depositing a superconducting thin film of bismuth-containing compound oxide on a substrate by physical vapor deposition, the improvement wherein the substrate is heated at a temperature between 670.degree. and 750.degree. C. during the deposition.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: September 24, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenjiro Higaki, Keizo Harada, Naoji Fujimori, Hideo Itozaki, Shuji Yazu
  • Patent number: 4997813
    Abstract: Improvement in a superconducting thin film of a superconducting compound oxide containing thallium (T1) deposited on a substrate, characterized in that the superconducting thin film is deposited on {110} plane of a single crystal of magnesium oxide (MgO).
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: March 5, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenjiro Higaki, Keizo Harada, Naoji Fujimori, Hideo Itozaki, Shuji Yazu
  • Patent number: 4996190
    Abstract: Improvement in a superconducting thin film of a superconducting compound oxide containing bismuth (Bi) deposited on a substrate, characterized in that the superconducting thin film is deposited on {110} plane of a single crystal of magnesium oxide (MgO).
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: February 26, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenjiro Higaki, Keizo Harada, Naoji Fujimori, Hideo Itozaki, Shuji Yazu
  • Patent number: 4996185
    Abstract: In a superconducting thin film composed of compound oxide containing at least one of element selected from a group comprising Y, La, Gd, Ho, Er, Tm, Yb, Dy, Sm, Eu and Lu, Ba and Cu, improvement in that said thin film consists of a single crystal or polycrystal whose c-axis is orientated to a predetermined direction or mono-directionally.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: February 26, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Naoji Fujimori, Keizo Harada, Shuji Yazu, Tetsuji Jodai
  • Patent number: 4942152
    Abstract: A novel process for preparing superconductor of bismuth-containing compound oxide such as Bi--Sr--Ca--Cu system.In the present invention, firstly an intermediate compound oxide containing metal elements of the superconductor except bismuth is prepared and then the intermediate compound oxide is contacted with bismuth oxide vapour at a temperature between 750.degree. and 950.degree. C. so that bismuth oxide is reacted with said intermediate compound oxide.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: July 17, 1990
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hideo Itozaki, Keizo Harada, Shuji Yazu
  • Patent number: 4866032
    Abstract: A thin film of a preselected compound having a large area is continuously produced on a substrate by depositing elements constituting the preselected compound from a target member onto the surface of a substrate by sputtering, comprising the steps of:rotating a first target member having a flat surface disposed around an axis which crosses the surface and comprising elements of the preselected compound so that a first part of the surface of target member is positioned at a first sputtering position and another part of the first target member is positioned at a second sputtering position,at the first position, sputtering at least one second target comprising at least one element of the preselected compound which is easily sputtered from the first target member so as to supply the deficient element to the first target member, andat the second position, sputtering the elements from the first target member so as to deposit them on the surface of said substrate while continuously supplying the substrate so that a
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: September 12, 1989
    Assignee: Sumimoto Electric Industries, Ltd.
    Inventors: Naoji Fujimori, Keizo Harada, Shuji Yazu, Tetsuji Jodai
  • Patent number: 4822359
    Abstract: An intraocular lens comprises an artificial crystalline lens and a diamond-like carbon film coated on the surface of the artificial crystalline lens.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: April 18, 1989
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasuo Tano, Hisashi Hosotani, Naoji Fujimori, Keizo Harada