Patents Assigned to Entact, Inc.
  • Method for treatment of solid waste to minimize permeability of the waste
    Patent number: 5931773
    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; polyphosphoric acid; phosphoric acids; salts of phosphoric acids; P.sub.2 O.sub.5 ; phosphate rock; monoammonium phosphate; disodium hydrogen phosphate; trisodium phosphate; water soluble phosphate; Fe(II); Fe(III); Al(III); chloride; Fe(NO.sub.3).sub.3 ; FeSO.sub.4 ; Fe.sub.2 (SO.sub.4).sub.3 ; FeCl.sub.3 ; Al.sub.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: August 3, 1999
    Assignee: Entact, Inc.
    Inventor: Philip J. Pisani
  • 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 heavy metals
    Patent number: 5674176
    Abstract: This invention relates to the treatment of contaminated materials including soils and solids, 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 from the group consisting of phosphoric acid, monocalcium phosphate monammonium phosphate and diammonium phosphate either alone or in combination with Portland cement.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: October 7, 1997
    Assignee: Entact, Inc.
    Inventor: Sherry Ann Pierce
  • Method for treatment and disposal of lead based paint
    Patent number: 5667696
    Abstract: This invention relates to the treatment of lead based paint mixtures by treating the lead based paint mixture with an additive from the group consisting of phosphoric acid, monocalcium phosphate, monoammonium phosphate and diammonium phosphate, either alone or in combination with Portland Cement.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: September 16, 1997
    Assignee: Entact, Inc.
    Inventors: Michael Kell Studer, Philip J. Pisani