Patents by Inventor C. Samuel Graham

C. Samuel Graham 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).

  • Filtering apparatus
    Patent number: 3956130
    Abstract: An automatic filtering apparatus which provides an aliquot of filtrate of a particular quantity desired is provided. A solid-liquid mixture is introduced to a filter means under positive air pressure to provide the liquid filtrate. The filtrate flows into a receiving means defining the volume of the particular quantity desired. Excess filtrate flows into an overflow reservoir and out a waste line connected thereto. The filtrate in the receiving means can be transferred into a delivery means. Advantageously, a three-way stop-cock is disposed between the filter receiving means and delivery means and the flow paths are determined by the position of the stop-cock.
    Type: Grant
    Filed: June 27, 1974
    Date of Patent: May 11, 1976
    Assignee: The United States of America as represented by the Department of Health, Education and Welfare
    Inventors: Robert F. Cunningham, Edward J. Walsh, C. Samuel Graham, Willie D. Slayton, Adrian Hailine