Patents by Inventor Dewey W. Black

Dewey W. Black 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).

  • Apparatus for removing gelatinous sludge and solids from settling basins
    Patent number: 4024881
    Abstract: Gelatinous and other sludge agglomerations resulting from the clarifications of raw water or waste water is removed from the bottom of settling receptacles, such as basins, ponds, lagoons and clarifiers where velocity is reduced to facilitate separation. The settled gelatinous sludge and other solids are removed from the receptacle by introducing streams of liquid into contact with the sludge so as to produce laminar flow toward a withdrawal point or points without disturbing the supernatant water or other fluid.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: May 24, 1977
    Assignee: Environment Improvement Systems, Inc.
    Inventors: Henry J. Weiland, Dewey W. Black
  • Process of treating gelatinous sludge agglomerations
    Patent number: 3997438
    Abstract: Gelatinous sludge agglomerations resulting from the clarification of raw water is separated from the raw water and is then treated with lime in an amount required to react with the gelatinous sludge and produce a filterable sludge in water. The filterable sludge is settled in the water carrying the same and is then separated therefrom and passed through filter means to separate solids from liquid.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: December 14, 1976
    Assignee: Environment Improvement Systems, Inc.
    Inventors: Henry J. Weiland, Dewey W. Black