Patents by Inventor Donald U. Gubser

Donald U. Gubser 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).

  • High temperature superconducting ceramic oxide composite with reticulated metal foam
    Patent number: 6700067
    Abstract: A high temperature superconducting composite rod, wire or tape is formed by filling the open cells of a reticulated foam structure made of silver, silver alloy, gold or gold alloy with a superconducting ceramic oxide or precursor, compacting the filled structure and forming it into a rod, wire or tape and heating it to melt and/or texture the superconducting ceramic oxide. The resulting composite has continuous ligaments of metal throughout a continuous region of superconducting ceramic oxide.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: March 2, 2004
    Assignee: The Secretary of the United States of America as represented by the Secretary of the Navy
    Inventors: Donald U. Gubser, M. Ashraf Imam
  • Method of making high temperature superconducting ceramic oxide composite with reticulated metal foam
    Patent number: 6185810
    Abstract: A high temperature superconducting composite rod, wire or tape is formed by filling the open cells of a reticulated foam structure made of silver, silver alloy, gold or gold alloy with a superconducting ceramic oxide or precursor, compacting the filled structure and forming it into a rod, wire or tape and heating it to melt and/or texture the superconducting ceramic oxide. The resulting composite has continuous ligaments of metal throughout a continuous region of superconducting ceramic oxide.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: February 13, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Donald U. Gubser, M. Ashraf Imam
  • Method of making substantially single phase superconducting oxide ceramics having a Tc above 85 degrees
    Patent number: 5106829
    Abstract: A substantially single phase superconducting composition is formed from a of 1:2:3 molar ratio of fine powders of a superconducting rare earth oxide, CuO, and BaCo.sub.3. The mixed powders and shaped articles formed from the mixed powders are calcined, sintered, and cooled in an oxygen containing atmosphere. The cooling step is done slowly to convert the sample to the orthorhombic structure and to improve the superconducting properties. The article formed is a substantially single phase superconducting composition.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: April 21, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Syed B. Quadri, Louis E. Toth, Michael S. Osofsky, Steven H. Lawrence, Donald U. Gubser, Stuart A. Wolf
  • V.sub.3 Ga Composite superconductor
    Patent number: 4190701
    Abstract: A composite superconductor which comprises:(1) A matrix sheath of a copper-base alloy containing from about 12 to ab 20 at. % of gallium and from about 0.2 to about 6 at. % of aluminum;(2) a core in said matrix sheath, said core being of a vanadium-base alloy containing from about 1.0 to about 9.5 at. % of gallium and from about 0.1 to about 2.5 at. % of titanium; and(3) a continuous interfacial layer of V.sub.3 Ga between said matrix sheath and said core.
    Type: Grant
    Filed: April 6, 1979
    Date of Patent: February 26, 1980
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David G. Howe, Donald U. Gubser
  • Multilayer super-conducting shield and method of manufacturing same
    Patent number: H39
    Abstract: A multi-layer superconducting shield for shielding superconducting electronic devices from stray magnetic fields. In one embodiment the shield of the present invention comprises alternating concentric layers of a transition metal having a high transition temperature and a metal alloy formed from copper and a non-transition metal, said transition metal and metal alloy forming an interface, and a layer of A.sub.3 B-compound structure metal at the interface of said transition metal and metal alloy. The A.sub.3 B-compound structure metal is a high transition temperature superconductor.In a second embodiment the superconducting shield comprises a thin film of a high transition temperature superconducting nitride compound deposited on a cylindrical substrate. The nitride is deposited by reactive rf sputtering.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: March 4, 1986
    Assignee: The Government of the United States
    Inventors: Donald U. Gubser, Stuart A. Wolf