Patents by Inventor Steven A. Costello

Steven A. Costello 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).

  • Patent number: 5977422
    Abstract: This invention relates to an improved catalytic process for the alkylation of benzene or substituted benzene with alkyl halides for the continuous production of diarylalkanes or substituted derivatives thereof using ethylaluminum dichloride or methylaluminum dichloride as an organoaluminum dichloride catalyst. A process and apparatus are provided for reacting either benzene (or a substituted benzene compound) together with either an alkyl halide or an aromatic halide.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: November 2, 1999
    Assignee: The Dow Chemical Company
    Inventors: Steven A. Costello, Douglas L. Potts, Randall F. Pogue