Patents by Inventor Mitchell Derrick

Mitchell Derrick 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).

  • Vibratory screen assembly and method of manufacture
    Publication number: 20050133465
    Abstract: A screen assembly comprising a support, a screen comprising peaks and troughs, and a coating on at least a portion of a plurality of the peaks. An apparatus for screening material comprising a frame, a motor mounted to the frame, a screen assembly supported by the frame, a chamber beneath the screen assembly adapted to be placed intermittently at less than atmospheric pressure, a screen formed in an undulating shape comprising a plurality of peaks and troughs, and a coating on at least a portion of a plurality of the peaks.
    Type: Application
    Filed: October 29, 2004
    Publication date: June 23, 2005
    Applicant: Derrick Corporation
    Inventors: Mitchell Derrick, Robert Derrick, James Mooney
  • Vibratory screening machine with suction and method for screening a slurry
    Publication number: 20050082236
    Abstract: Disclosed within are methods and apparatus for screening a slurry, in which the slurry is vibrated and conveyed across a screen and suction is applied from below the screen. Air, particles and liquid are drawn through openings in the screen and may be conveyed to a separator, where the particles and liquid are then separated from the air.
    Type: Application
    Filed: October 29, 2004
    Publication date: April 21, 2005
    Applicant: Derrick Corporation
    Inventors: Mitchell Derrick, Robert Derrick, James Mooney