Patents by Inventor Hironao Kojima

Hironao Kojima 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).

  • Superconductive oxide single crystal and manufacturing method thereof
    Patent number: 5444040
    Abstract: A method of manufacturing a single crystal of a superconductive oxide by a travelling solvent floating zone method (TSFZ Method). In this manufacturing method, a sintered feed rod of an oxide belonging to a tetragonal system, exhibiting anisotropic properties and superconductive properties and having a stoichiometric composition of the superconductive oxide is melted into a layer of a solvent mainly consisting of a oxidized copper and arranged in an infrared heating furnace under an oxygen pressure thereby growing a large single crystal of the superconductive oxide which is 5 mm or over in diameter and 40 mm or over in length.The superconductive oxide is one selected from the group consisting of La.sub.2-x A.sub.x CuO.sub.4 (A:Sr,Ba), Nd.sub.2-x Ce.sub.x CuO.sub.4, YBa.sub.2 Cu.sub.3 O.sub.7-x, BiSrCaCu.sub.2 O.sub.x, Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: August 22, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Hironao Kojima, Isao Tanaka