Patents by Inventor David M. Sparkman

David M. Sparkman 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).

  • Method of and apparatus for grinding solid organic waste material encountered in sewage waste and waste water reclamation
    Patent number: 4515317
    Abstract: A method of and apparatus involving an unrestricted gravity feed influent inlet and an unrestricted effluent outlet which is upward and opposed by the force of gravity, for grinding by the slicing action of jet streams of an incompressible fluid such as water, solid waste materials into homogeneous sized bits suitable for pumping and subsequent further processing in a waste treatment system.
    Type: Grant
    Filed: November 18, 1983
    Date of Patent: May 7, 1985
    Assignee: Thiokol Corporation
    Inventor: David M. Sparkman