Patents by Inventor Paul F. DaSilva

Paul F. DaSilva 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).

  • Hybrid high rate anaerobic treatment apparatus
    Patent number: 4780198
    Abstract: An anaerobic reactor for treatment of waste water comprises a primary reactor or zone of the suspended growth type and a secondary reactor or zone of the fixed filter bed type disposed directly above and in liquid contact with the primary reactor. Liquid to be treated is fed continuously into the primary reactor and moves upwardly through the primary reactor, then through the filter bed and out via an outlet above the filter bed. Gas generated in the primary reactor moves upwardly through the liquids and through the filter bed, to cause vertical mixing throughout the zones and to keep the filter bed from clogging.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: October 25, 1988
    Assignee: Gore & Storrie Ltd.
    Inventors: George V. Crawford, Paul F. Dasilva
  • Hybrid high rate anaerobic treatment process
    Patent number: 4676906
    Abstract: An anaerobic reactor for treatment of waste water comprises a primary reactor or zone of the suspended growth type and a secondary reactor or zone of the fixed filter bed type disposed directly above and in liquid contact with the primary reactor. Liquid to be treated is fed continuously into the primary reactor and moves upwardly through the primary reactor, then through the filter bed and out via an outlet above the filter bed. Gas generated in the primary reactor moves upwardly through the liquids and through the filter bed, to cause vertical mixing throughout the zones and to keep the filter bed from clogging.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: June 30, 1987
    Assignee: Gore & Storrie Limited
    Inventors: George V. Crawford, Paul F. DaSilva