Patents by Inventor Larry Gremminger

Larry Gremminger 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).

  • Lime and fly ash stabilization of wastewater treatment sludge
    Patent number: 5277826
    Abstract: This invention provides a process meeting the EPA's PFRP standard for WWTS treatment thereby producing a readily usable end-product in either soil-like form or semi-impermeable low load bearing, mass form. The process includes mixing WWTS with lime and fly ash, to cause a temperature increase to above 70.degree. C. for at least 30 minutes and to cause the pH to exceed 12 for at least 2 hours. The end-product may be compacted to produce an semi-impermeable, durable mass or the soil-like product may be used as landfill cover material.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: January 11, 1994
    Assignee: Browning Ferris Industries
    Inventors: Howard Burns, Larry Gremminger