Patents by Inventor John L. Riggs

John L. Riggs 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).

  • Formaldehyde process
    Patent number: 4424397
    Abstract: A process for the oxidative dehydrogenation of methanol to form formaldehyde using silver crystals as catalyst which silver crystals are supported on a screen formed of an alloy containing at least 20 weight percent gold and the remainder silver is disclosed.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: January 3, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David J. Hoene, John L. Riggs