Patents by Inventor David Leyshon

David Leyshon 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).

  • Publication number: 20070249886
    Abstract: A method is disclosed for upgrading drip oil comprising subjecting the drip oil to multiple distillation steps to form a stream rich in aromatics and a separate stream rich in dicyclopentadiene.
    Type: Application
    Filed: April 20, 2006
    Publication date: October 25, 2007
    Inventors: Krishnan Viswanathan, Lau Yang, Ellen Lenz, David Leyshon
  • Publication number: 20060086602
    Abstract: N-(2-hydroxyethyl)-2-pyrrolidone (HEP) is purified by a distillation sequence in which the purified HEP is recovered as a side stream without being separated as an overhead at any point in the procedure.
    Type: Application
    Filed: October 26, 2004
    Publication date: April 27, 2006
    Inventors: Andrew Kahn, David Leyshon, Shaw-Chan Lin
  • Publication number: 20050109677
    Abstract: This invention is a method of purifying fuel streams containing organosulfur impurities. The fuel stream is oxidized with an organic hydroperoxide in the presence of an oxidation catalyst to form a sulfone product. The alcohol product of the organic hydroperoxide is then removed from the oxidized fuel stream, followed by extraction of the sulfone product by solid-liquid extraction using solid adsorbents. The alcohol removal step is found to improve the adsorption capacity of the solid adsorbents.
    Type: Application
    Filed: November 26, 2003
    Publication date: May 26, 2005
    Inventors: Yuan-Zhang Han, David Leyshon