Patents Assigned to Internationnal Superconductivity Technology Center
  • Superconducting material
    Patent number: 5169830
    Abstract: A superconductive material is disclosed which has the following composition:(R.sub.1-x Ca.sub.x)(Ba.sub.1-y La.sub.y).sub.2 Cu.sub.4 O.sub.8wherein R is at least one element selected from Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, x is a number in the range of 0-0.3 and y is a number in the range of 0.001-0.3 with the proviso that y is not greater than 0.2 when x is not 0.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: December 8, 1992
    Assignees: Internationnal Superconductivity Technology Center, Mitsubushi Metal Corporation, Kyocera Corporation, The Tokyo Electric Power Company
    Inventors: Takahiro Wada, Shinichi Koriyama, Takeshi Sakurai, Nobuo Suzuki, Takayuki Miyatake, Hisao Yamauchi, Naoki Koshizuka, Shoji Tanaka