Patents by Inventor John T Johnson

John T Johnson 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).

  • Process for immobilization of protein catalysts, product, and use
    Patent number: 8318466
    Abstract: An immobilized protein catalyst is prepared by applying an adhesive to a polymeric support, applying a layer of a globular protein over the layer of adhesive, binding a crosslinking agent to the protein layer, and binding the protein catalyst by reaction with the crosslinking agent.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: November 27, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Daniel Dziedzic, John T Johnson, Kenneth B Gross
  • Process for immobilization of protein catalysts, product, and use
    Patent number: 7642076
    Abstract: An immobilized protein catalyst is prepared by applying an adhesive to a polymeric support, applying a layer of a globular protein over the layer of adhesive, binding a crosslinking agent to the protein layer, and binding the protein catalyst by reaction with the crosslinking agent.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: January 5, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Daniel Dziedzic, John T Johnson, Kenneth B Gross
  • Sequestration of carbon dioxide
    Patent number: 7132090
    Abstract: A process for selectively removing carbon dioxide from a gaseous stream by converting the carbon dioxide to a solid, stable form is provided. In a sequestration process, carbon dioxide enriched air is passed through a gas diffusion membrane to transfer the carbon dioxide to a fluid medium. The carbon dioxide rich fluid is then passed through a matrix containing a catalyst specific for carbon dioxide, which accelerates the conversion of the carbon dioxide to carbonic acid. In the final step, a mineral ion is added to the reaction so that a precipitate of carbonate salt is formed. This solid mineral precipitate can be safely stored for extended periods of time, such as by burying the precipitate in the ground or depositing the precipitate into storage sites either on land or into a body of water. An apparatus for removing carbon dioxide from a gaseous stream is also provided.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: November 7, 2006
    Assignee: General Motors Corporation
    Inventors: Daniel Dziedzic, Kenneth B Gross, Robert A Gorski, John T Johnson