Patents by Inventor John Carleton Curtis

John Carleton Curtis 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).

  • Hydrogen peroxide oxidation of carbon black
    Patent number: 6120594
    Abstract: A process for the oxidation of carbon black with an aqueous mixture of hydrogen peroxide where carbon blacks are mixed with aqueous hydrogen peroxide then dried in order to efficiently oxidize industrial quantities of carbon black using standard carbon black production equipment and production rates and under conditions that produce no hazardous emissions and require no special handling.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: September 19, 2000
    Assignee: Columbian Chemicals Company
    Inventors: John Carleton Curtis, Rodney L. Taylor, George A. Joyce