Patents by Inventor James R. Groves

James R. Groves 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).

  • Biaxially textured composite substrates
    Patent number: 6884527
    Abstract: An article including a substrate, a layer of a metal phosphate material such as an aluminum phosphate material upon the surface of the substrate, and a layer of an oriented cubic oxide material having a rock-salt-like structure upon the metal phosphate material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon a layer of a buffer material such as a SrTixRu1?xO3 layer.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: April 26, 2005
    Assignee: The Regents of the University of California
    Inventors: James R. Groves, Stephen R. Foltyn, Paul N. Arendt
  • High temperature superconducting composite conductors
    Patent number: 6843898
    Abstract: Copper or excess copper is added to one or more layers of a superconducting composite structure to reduce migration of copper form a copper based superconducting layer.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: January 18, 2005
    Assignee: The Regents of the University of California
    Inventors: Terry G. Holesinger, Stephen R. Foltyn, Paul N. Arendt, James R. Groves, Quanxi Jia, Alicia Ayala
  • Buffer layers on metal alloy substrates for superconducting tapes
    Publication number: 20040206952
    Abstract: An article including a substrate, a layer of an inert oxide material upon the surface of the substrate, a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the amorphous oxide material layer, and a layer of a SrRuO3 buffer material upon the oriented cubic oxide material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon the layer of a SrRuO3 buffer material layer. With a HTS top-layer of YBCO upon at least one layer of the SrRuO3 buffer material in such an article, Jc's of up to 1.3×106 A/cm2 have been demonstrated with projected Ic's of over 200 Amperes across a sample 1 cm wide.
    Type: Application
    Filed: May 6, 2004
    Publication date: October 21, 2004
    Inventors: Quanxi Jia, Stephen R. Foltyn, Paul N. Arendt, James R. Groves
  • Buffer layers on metal alloy substrates for superconducting tapes
    Patent number: 6800591
    Abstract: An article including a substrate, at least one intermediate layer upon the surface of the substrate, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the at least one intermediate layer, and a layer of a SrRuO3 buffer material upon the oriented cubic oxide material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon the layer of a SrRuO3 buffer material layer. With a HTS top-layer of YBCO upon at least one layer of the SrRuO3 buffer material in such an article, Jc's of up to 1.3×106 A/cm2 have been demonstrated with projected Ic's of over 200 Amperes across a sample 1 cm wide.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: October 5, 2004
    Assignee: The Regents of the University of California
    Inventors: Quanxi Jia, Stephen R. Foltyn, Paul N. Arendt, James R. Groves
  • High temperature superconducting composite conductors
    Publication number: 20040192560
    Abstract: Copper or excess copper is added to one or more layers of a superconducting composite structure to reduce migration of copper form a copper based superconducting layer.
    Type: Application
    Filed: April 6, 2004
    Publication date: September 30, 2004
    Inventors: Terry G. Holesinger, Stephen R. Foltyn, Paul N. Arendt, James R. Groves, Quanxi Jia, Alicia Ayala
  • Buffer layers on metal alloy substrates for superconducting tapes
    Patent number: 6756139
    Abstract: An article including a substrate, a layer of an inert oxide material upon the surface of the substrate, a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the amorphous oxide material layer, and a layer of a SrRuO3 buffer material upon the oriented cubic oxide material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon the layer of a SrRuO3 buffer material layer. With a HTS top-layer of YBCO upon at least one layer of the SrRuO3 buffer material in such an article, Jc′s of up to 1.3×106 A/cm2 have been demonstrated with projected IC's of over 200 Amperes across a sample 1 cm wide.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: June 29, 2004
    Assignee: The Regents of the University of California
    Inventors: Quanxi Jia, Stephen R. Foltyn, Paul N. Arendt, James R. Groves
  • High temperature superconducting composite conductors
    Patent number: 6716545
    Abstract: Copper or excess copper is added to one or more layers of a superconducting composite structure to reduce migration of copper form a copper based superconducting layer.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: April 6, 2004
    Assignee: The Regents of the University of California
    Inventors: Terry G. Holesinger, Stephen R. Foltyn, Paul N. Arendt, James R. Groves, Quanxi Jia, Alicia Ayala
  • High temperature superconducting thick films
    Publication number: 20040028954
    Abstract: An article including a substrate, a layer of an inert oxide material upon the surface of the substrate, (generally the inert oxide material layer has a smooth surface, i.e., a RMS roughness of less than about 2 nm), a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the amorphous oxide material layer is provided together with additional layers such as at least one layer of a buffer material upon the oriented cubic oxide material layer or a HTS top-layer of YBCO directly upon the oriented cubic oxide material layer. With a HTS top-layer of YBCO upon at least one layer of a buffer material in such an article, Jc's of 1.4×106 A/cm2 have been demonstrated with projected Ic's of 210 Amperes across a sample 1 cm wide.
    Type: Application
    Filed: September 25, 2003
    Publication date: February 12, 2004
    Inventors: Paul N. Arendt, Stephen R. Foltyn, James R. Groves, Terry G. Holesinger, Quanxi Jia
  • Buffer layers on metal alloy substrates for superconducting tapes
    Publication number: 20040023077
    Abstract: An article including a substrate, a layer of an inert oxide material upon the surface of the substrate, a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the amorphous oxide material layer, and a layer of a SrRuO3 buffer material upon the oriented cubic oxide material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon the layer of a SrRuO3 buffer material layer. With a HTS top-layer of YBCO upon at least one layer of the SrRuO3 buffer material in such an article, Jc's of up to 1.3×106 A/cm2 have been demonstrated with projected IC's of over 200 Amperes across a sample 1 cm wide.
    Type: Application
    Filed: March 28, 2002
    Publication date: February 5, 2004
    Inventors: Quanxi Jia, Stephen R. Foltyn, Paul N. Arendt, James R. Groves
  • BUFFER LAYERS ON METAL ALLOY SUBSTRATES FOR SUPERCONDUCTING TAPES
    Publication number: 20040018394
    Abstract: An article including a substrate, at least one intermediate layer upon the surface of the substrate, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the at least one intermediate layer, and a layer of a SrRuO3 buffer material upon the oriented cubic oxide material layer is provided together with additional layers such as a HTS top-layer of YBCO directly upon the layer of a SrRuO3 buffer material layer. With a HTS top-layer of YBCO upon at least one layer of the SrRuO3 buffer material in such an article, Jc's of up to 1.3×106 A/cm2 have been demonstrated with projected Ic's of over 200 Amperes across a sample 1 cm wide.
    Type: Application
    Filed: September 11, 2002
    Publication date: January 29, 2004
    Inventors: Quanxi Jia, Stephen R. Foltyn, Paul N. Arendt, James R. Groves
  • Substrate structure for growth of highly oriented and/or epitaxial layers thereon
    Publication number: 20030144150
    Abstract: A composite substrate structure including a substrate, a layer of a crystalline metal oxide or crystalline metal oxynitride material upon the substrate, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the crystalline metal oxide or crystalline metal oxynitride material layer is provided together with additional layers such as one or more layers of a buffer material upon the oriented cubic oxide material layer.
    Type: Application
    Filed: February 7, 2003
    Publication date: July 31, 2003
    Inventors: Paul N. Arendt, Stephen R. Foltyn, James R. Groves, Quanxi Jia
  • High temperature superconducting thick films
    Publication number: 20030036483
    Abstract: An article including a substrate, a layer of an inert oxide material upon the surface of the substrate, (generally the inert oxide material layer has a smooth surface, i.e., a RMS roughness of less than about 2 nm), a layer of an amorphous oxide or oxynitride material upon the inert oxide material layer, a layer of an oriented cubic oxide material having a rock-salt-like structure upon the amorphous oxide material layer is provided together with additional layers such as at least one layer of a buffer material upon the oriented cubic oxide material layer or a HTS top-layer of YBCO directly upon the oriented cubic oxide material layer. With a HTS top-layer of YBCO upon at least one layer of a buffer material in such an article, Jc's of 1.4×106 A/cm2 have been demonstrated with projected Ic's of 210 Amperes across a sample 1 cm wide.
    Type: Application
    Filed: December 6, 2000
    Publication date: February 20, 2003
    Inventors: Paul N. Arendt, Stephen R. Foltyn, James R. Groves, Terry G. Holesinger, Quanxi Jia