Patents by Inventor David Froud

David Froud 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).

  • Odor control apparatus
    Patent number: 6565801
    Abstract: Odor control apparatus comprising a container for containing solid malodorous material, and inlet means for feeding deodorizing gaseous material over the solid malodorous material contained in the container.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: May 20, 2003
    Assignee: CSO Technik Limited
    Inventors: David Froud, Colin D. Froud
  • Effluent filtration and sack filter apparatus
    Patent number: 5286387
    Abstract: Apparatus for filtering liquid effluent comprises, in sequence, inlet means, filtration means, and outlet means. Each filtration means comprises at least one disposable sack filter (2, 3, 4, 31) of defined porosity. The open end of each sack filter is attached to an outlet conduit in communication with the inlet means. The opposing closed ends of the sack filters are attached to movable supports to cause agitation of the sack filters.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: February 15, 1994
    Assignee: Copa Research Limited
    Inventor: David Froud