Patents by Inventor Clyde H. Shearer

Clyde H. Shearer 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).

  • Production of a superconductor powder having a narrow melting transition width using a controlled oxygen atmosphere
    Patent number: 5149684
    Abstract: A process for preparing a superconductor-coated substrate including calcining a mixture of powdered yttrium or rare earth oxide (R), barium carbonate and copper oxide in a controlled atmosphere and in accordance with a predetermined temperature profile to form a superconductor powder having a stoichiometric ratio of R-Ba-Cu of approximately 1-2-3. The melting transition width of the resulting powder is relatively narrow, such that the melting onset temperature is above the high temperatures advantageously used to sinter the powder on the substrate.
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: September 22, 1992
    Assignee: General Atomics
    Inventors: Lawrence D. Woolf, Frederick H. Elsner, Clyde H. Shearer
  • Process for soldering superconducting fibers into a copper channel
    Patent number: 5123586
    Abstract: A process for joining ceramic superconductor fibers with a channel to fabricate a superconductor wire includes feeding the fibers into the channel and continuously dispensing a flowable solder paste into the channel over the fibers. The combination of channel, fibers and solder paste is then subjected to a rapid rise in temperature which sequentially activates the flux in the solder paste and then melts the solder. After the workpiece is cooled and the separated flux has been removed, a superconductor wire has been fabricated.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: June 23, 1992
    Assignee: General Atomics
    Inventors: Lawrence D. Woolf, Clyde H. Shearer, Frederick H. Elsner
  • Stabilized lanthanum sulphur compounds
    Patent number: 4545967
    Abstract: Lanthanum sulfide is maintained in the stable cubic phase form over a temperature range of from 500.degree. C. to 1500.degree. C. by adding to it small amounts of calcium, barium, or strontium. This novel compound is an excellent thermoelectric material.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: October 8, 1985
    Assignee: The United States of America as represented by the United States National Aeronautics and Space Administration
    Inventors: George H. Reynolds, Norbert B. Elsner, Clyde H. Shearer