Patents by Inventor John L. Holder

John L. Holder 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 and apparatus for water jet moving bed filtration system
    Publication number: 20130020266
    Abstract: A process water filtration system includes a vessel (12) containing filter media units (14). Water jets (30 and 32) create movement of the filter media units (14).
    Type: Application
    Filed: February 27, 2012
    Publication date: January 24, 2013
    Inventors: Michael B. Timmons, John L. Holder
  • Water filtration system and its use
    Patent number: 7527730
    Abstract: The present invention relates to a filtration system for purifying water, in particular aquaculture water. Furthermore, the invention relates to a method of purifying water wherein water is supplied to a filtration system, comprising filtration medium for filtering water and a grid for preventing water channeling within the filter wherein said grid comprises means for allowing passage of said filtration medium through the grid, and a water recirculation system for purifying contaminated water from aquaculture and recirculating purified water to the aquaculture.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: May 5, 2009
    Assignee: Holder Timmons Engineering, LLC
    Inventors: Ragnar Johannsson, James E. Timmons, John L. Holder, Michael B. Timmons