Patents by Inventor Joseph R. Brewer

Joseph R. Brewer 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).

  • Cerium oxide having high catalytic performance
    Patent number: 9561491
    Abstract: A catalyst that includes cerium oxide having a fluorite lattice structure is provided. The cerium oxide includes cerium atoms in mixed valence states of Ce3+/Ce4+, in which the ratio of Ce3+/(Ce3++Ce4+) in the lattice ranges from 40% to 90% at 20° C. The valence states Ce3+ and Ce4+ are reversible in reduction and oxidation reactions, and the cerium oxide maintains catalytic ability at temperatures at least up to 450° C.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: February 7, 2017
    Assignee: NUtech Ventures
    Inventors: Chin Li Cheung, Neil J. Lawrence, Joseph R. Brewer, Gonghua Wang
  • RARE EARTH SULFIDE THIN FILMS
    Publication number: 20130118564
    Abstract: An apparatus that includes a photovoltaic cell is provided. The photovoltaic cell includes a p-type thin film having a first rare earth sulfide, and an n-type thin film having a second rare earth sulfide. A p-n junction is formed between the p-type thin film and the n-type thin film. The photovoltaic cell includes a substrate and an at least partially transparent layer. The p-type and n-type thin films are deposited between the substrate and the at least partially transparent layer.
    Type: Application
    Filed: April 6, 2011
    Publication date: May 16, 2013
    Inventors: Chin Li Cheung, Joseph R. Brewer
  • CERIUM OXIDE HAVING HIGH CATALYTIC PERFORMANCE
    Publication number: 20130123100
    Abstract: A catalyst that includes cerium oxide having a fluorite lattice structure is provided. The cerium oxide includes cerium atoms in mixed valence states of Ce3+/Ce4+, in which the ratio of Ce3+/(Ce3++Ce4+) in the lattice ranges from 40% to 90% at 20° C. The valence states Ce3+ and Ce4+ are reversible in reduction and oxidation reactions, and the cerium oxide maintains catalytic ability at temperatures at least up to 450° C.
    Type: Application
    Filed: April 6, 2011
    Publication date: May 16, 2013
    Inventors: Chin Li Cheung, Neil J. Lawrence, Joseph R. Brewer, Gonghua Wang