Patents by Inventor David J. Featherstonhaugh

David J. Featherstonhaugh 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).

  • Wastewater treatment system
    Patent number: 6811705
    Abstract: A wastewater treatment system for use on marine vessels or land-based applications treats wastewater by solids separation and oxidation. The system includes a solids separation tank, an oxidation tank having a plurality of chambers and a fluid circuit for re-circulating treated wastewater into the solids separation tank and oxidation tank for further treatment. An ozone generator produces ozone which is dissolved in the treated wastewater in the re-circulating fluid conduit and is used for the solids separation and oxidation processes. The treated wastewater is periodically discharged into the environment.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: November 2, 2004
    Assignee: Hydroxyl Systems Inc.
    Inventors: Juergen K. Puetter, Steven C. Depoli, David J. Featherstonhaugh
  • Wastewater treatment system
    Publication number: 20020117458
    Abstract: A wastewater treatment system for use on marine vessels or land-based applications treats wastewater by solids separation and oxidation. The system includes a solids separation tank, an oxidation tank having a plurality of chambers and a fluid circuit for re-circulating treated wastewater into the solids separation tank and oxidation tank for further treatment. An ozone generator produces ozone which is dissolved in the treated wastewater in the re-circulating fluid conduit and is used for the solids separation and oxidation processes. The treated wastewater is periodically discharged into the environment.
    Type: Application
    Filed: February 21, 2002
    Publication date: August 29, 2002
    Applicant: Hydroxyl Systems Inc.
    Inventors: Juergen K. Puetter, Steven C. Depoli, David J. Featherstonhaugh