Patents by Inventor Thomas G. Callery

Thomas G. Callery 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).

  • Production of dry, free flowing solids from bio-waste sludge
    Patent number: 5593591
    Abstract: Dry, free flowing solids, suitable for handling, transportation and/or disposal are produced from messy biologically treated sludges. In the process, the sludge feed is pressurized and heated, then flashed, in order to vaporize a portion of the water; the residual liquid, containing the solids and sometimes heavy metals, is contacted with a chelating agent, if needed, and a flocculating agent over a brief reaction period in order to precipitate a concentrated solid precipitate; and the precipitate is separated from the residual liquid water.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 14, 1997
    Assignee: Unipure Corporation
    Inventors: Ernest O. Ohsol, Thomas G. Callery