Patents by Inventor Roger P. Summerhays

Roger P. Summerhays 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).

  • Treatment of iron concentrate slurry to improve filtration
    Patent number: 4107028
    Abstract: An improved process for filter dewatering of an iron ore concentrate slurry produced from iron ore by selective flocculation followed by flotation wherein acid and then a surface tension reducing agent of the sulfosuccinate class is added to the concentrate slurry before the slurry is filtered.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: August 15, 1978
    Assignee: Envirotech Corporation
    Inventors: Robert C. Emmett, Jr., Stanley D. Heden, Roger P. Summerhays