Patents by Inventor Joseph Douglas Sanders

Joseph Douglas Sanders 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).

  • Polystyrene processing apparatus and method
    Patent number: 7935783
    Abstract: A method and apparatus for processing polystyrene. The method includes the steps: using at least one scrapped surface heat exchanger (160) to heat a solution of polystyrene dissolved in an organic solvent to provide a heated solution of polystyrene dissolved in the organic solvent, and separating the dissolved polystyrene from the organic solvent. The apparatus includes: a holding tank at least partly filled with a solution of polystyrene dissolved in an organic solvent, at least one scrapped surface heat exchanger (160), and a separator.
    Type: Grant
    Filed: January 23, 2010
    Date of Patent: May 3, 2011
    Inventor: Joseph Douglas Sanders
  • Polystyrene Processing Apparatus and Method
    Publication number: 20100123261
    Abstract: A method and apparatus for processing polystyrene. The method includes the steps: using at least one scrapped surface heat exchanger (160) to heat a solution of polystyrene dissolved in an organic solvent to provide a heated solution of polystyrene dissolved in the organic solvent, and separating the dissolved polystyrene from the organic solvent. The apparatus includes: a holding tank at least partly filled with a solution of polystyrene dissolved in an organic solvent, at least one scrapped surface heat exchanger (160), and a separator.
    Type: Application
    Filed: January 23, 2010
    Publication date: May 20, 2010
    Inventor: Joseph Douglas Sanders
  • Polystyrene processing apparatus and method
    Patent number: 7696305
    Abstract: A method and apparatus for processing polystyrene. The method includes the steps: using at least one scrapped surface heat exchanger (160) to heat a solution of polystyrene dissolved in an organic solvent to provide a heated solution of polystyrene dissolved in the organic solvent, and separating the dissolved polystyrene from the organic solvent. The apparatus includes: a holding tank at least partly filled with a solution of polystyrene dissolved in an organic solvent, at least one scrapped surface heat exchanger (160), and a separator.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: April 13, 2010
    Inventor: Joseph Douglas Sanders
  • Polystyrene processing apparatus and method
    Patent number: 7592416
    Abstract: A method and apparatus for processing polystyrene. The method includes the steps of: receiving a solution in the form of polystyrene polymer dissolved in an organic solvent; and separating the polystyrene from the solvent by applying heat to the solution to provide a heated solution and then spraying the heated solution to separate the polystyrene from the solvent. The apparatus includes: a holding tank at least partly filled with a solution of polystyrene dissolved in an organic solvent; at least one heat exchanger (170); and a separator in the form of a sprayer unit.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: September 22, 2009
    Inventor: Joseph Douglas Sanders