Patents by Inventor Donald Frank Rohr, Jr.

Donald Frank Rohr, Jr. 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 for oxidation of xylene derivatives
    Patent number: 6465685
    Abstract: Xylene derivatives, such as chloro-ortho-xylene, are oxidized in a solvent in the presence of at least one metal catalyst with addition of promoter after the reaction has proceeded to an intermediate stage of conversion to product mixture. The product comprises chlorophthalic acid or chlorophthalic anhydride.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: October 15, 2002
    Assignee: General Electric Company
    Inventors: Peter David Phelps, Donald Frank Rohr, Jr., Sheree Lynell Schattenmann