Patents by Inventor Dwain T. Cline, Jr.

Dwain T. Cline, 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).

  • Process for manufacture of an attrition resistant catalyst
    Patent number: 6878668
    Abstract: A method for manufacturing of an attrition resistant vanadium/phosphorous oxide catalyst involving forming an aqueous slurry comprising; vanadium/phosphorous oxide catalyst or vanadium/phosphorous oxide catalyst precursor particles, an aqueous solution of H3PO4, and optionally an aqueous colloidal silica sol, an aqueous polysilicic acid solution or mixture thereof and then spray drying the slurry to form attrition resistant catalyst precursor followed by calcining/activating the spray dried precursor. Such a catalyst is particularly useful in oxidation processes such as the catalytic air oxidation of butane to maleic anhydride.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: April 12, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jo-Ann T. Schwartz, Dwain T. Cline, Jr.