Patents by Inventor Leon F. Hammond, Jr.

Leon F. Hammond, 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).

  • Steam-polymer separation apparatus
    Patent number: 4134736
    Abstract: The spiral agitator in a vessel for separating steam from polymer is modified by providing holes in the ribbon flight at locations adjacent to the locations where the ribbon flight is supported by struts for the purpose of allowing the polymer to flow through the holes and sweep the area directly behind the struts to prevent gel buildup in these locations.
    Type: Grant
    Filed: February 22, 1978
    Date of Patent: January 16, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leon F. Hammond, Jr.