Patents by Inventor Annah Waswa Hughes

Annah Waswa Hughes 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 hydroxylating aromatic compounds
    Patent number: 5912391
    Abstract: Aromatic compounds such as benzene, toluene and xylene are hydroxylated by reaction with oxygen and hydroquinone or a substituted hydroquinone in the presence of a vanadium compound, typically a pentavalent vanadium oxy chelate with picolinic acid or a substituted picolinic acid. The vanadium compound may be produced in situ by reaction of the chelating agent with a tetravalent or pentavalent precursor vanadium compound.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: June 15, 1999
    Assignee: General Electric Company
    Inventors: Terence Michael Barnhart, Annah Waswa Hughes