Patents by Inventor Dwayne L. Knopik

Dwayne L. Knopik 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).

  • Patent number: 4323122
    Abstract: The invention provides a system and method for recovering organic liquid such as gasoline which has settled on the water table in underground areas. The system comprises a conduit extending from the ground surface to a point just above the water table, a collection head fitted on the lower end of the conduit, a collection vessel connected to the upper end of the conduit and an exhaust means for creating less than atmospheric pressure in the vessel. The collection head has a liquid impermeable end portion and a liquid permeable intermediate portion for permitting the passage of liquid.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: April 6, 1982
    Inventor: Dwayne L. Knopik