Patents by Inventor Randall B. Underwood

Randall B. Underwood 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).

  • Waste water treatment system with slip stream
    Patent number: 6709599
    Abstract: A method and apparatus for processing waste streams wherein a slipstream is formed on the upstream side of an ultrafiltration membrane (120) to carry collected and concentrated filter reject to a microfilter (170) via a slipstream through a conduit (155) at a very low flux through the microfilter. The low flux gives the particles in this stream a chance to interact and thus form an irregular matrix that itself helps to trap particles. The effluent from this matrix and microfilter is returned upstream of the ultrafiltration membrane via a conduit (165) to be repeatedly collected and concentrated. The suspended solids removed from the reject stream and microfilter may then be disposed of directly without further processing. For metal ions, the removal efficiency of ultrafiltration membrane can be improved by injecting sulfide compounds or other compounds upstream of ultrafiltration membrane.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: March 23, 2004
    Assignee: Rwe Nukem Corporation
    Inventors: Stefan Rosenberger, James H Wilson, Howard Whitehead, Randall B. Underwood, John M Raymount, Jr.