Patents by Inventor Edward James Simpson

Edward James Simpson 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).

  • Method to produce aromatic dicarboxylic acids using cobalt and zirconium catalysts
    Patent number: 6153790
    Abstract: A process to produce terephthalic acid is provided, the process including the steps of: providing a feed stream comprising a dialkyl substituted aromatic and in an organic acid solvent: contacting the feed stream with an oxidant, the oxidant containing at least 50% by volume oxygen and at an oxygen partial pressure of at least 1 psia, at a temperature between about 80.degree. C. and about 130.degree. C.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: November 28, 2000
    Assignee: Shell Oil Company
    Inventors: Raymond Lawrence June, Michael Wayne Potter, Edward James Simpson, Charles Lee Edwards