Patents by Inventor Sherry A. Pierce

Sherry A. Pierce 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).

  • Method for treatment of solid waste to minimize permeability of the waste
    Patent number: 5788623
    Abstract: This invention relates to the treatment of contaminated materials including soils and solids to reduce its permeability, and in particular to chemical treatment of waste or solids containing high levels of heavy metals such as lead, by treating the waste or solid with a single additive or combination of additives including calcium carbonate; reactive magnesium carbonate; reactive calcium magnesium carbonate; magnesium oxide; magnesium hydroxide; ammonium phosphate; diammonium phosphate; phosphoric acid; boric acid; metallic iron; polyphosphoric acid; sodium carbonate; sodium bicarbonate; calcium oxide; calcium hydroxide; sodium hydrogen phosphate; triple super phosphate (TSP); superphosphate and polyphosphoric acid.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: August 4, 1998
    Assignee: Entact, Inc.
    Inventors: Michael Kell Studer, Philip J. Pisani, Sherry A. Pierce
  • Method for treatment of solid waste to minimize permeability of the waste
    Patent number: 5591116
    Abstract: This invention relates to the treatment of contaminated materials including soils and solids to reduce its permeability, and in particular to chemical treatment of waste or solids containing high levels of heavy metals such as lead, by treating the waste or solid with an additive such as monocalcium phosphate either alone or in combination with Portland Cement.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: January 7, 1997
    Assignee: Entact Corporation
    Inventor: Sherry A. Pierce