Patents Assigned to Dyncorp, Inc.
  • Method and composition for remediating environmental contaminants
    Patent number: 6100382
    Abstract: A method and composition for the remediation of environmental contaminants in soil, sediment, aquifer material or water wherein contaminants are first reduced with a reducing agent found in sediment and are then oxidized to environmentally safe products. The composition includes a reducing agent, solubilized from sediment by a solvent, for reduction of environmental contaminants such as nitroorganics, halogenated hydrocarbons, cyano compounds, anisoles and metals.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: August 8, 2000
    Assignees: The United States of America as represented by the Environmental Protection Agency, Dyncorp, Inc
    Inventors: N. Lee Wolfe, Laura H. Carreira, Mark C. Delgado
  • Remediation of environmental contaminants using a metal and a sulfur-containing compound
    Patent number: 6039882
    Abstract: A method and composition for the remediation of environmental contaminants in soil, sediment, aquifer material, water, or containers in which contaminants were contained, wherein contaminants are reacted with a remediating composition comprising a metal and a sulfur-containing compound to produce environmentally-acceptable, chemically reduced products. The method is useful for treating contaminants such as halogenated hydrocarbons, pesticides, chemical warfare agents and dyes. The remediating composition preferably contains comminuted, commercial grade iron and iron sulfide. The addition of an alcohol to the reactants enhances the rate of the remediation reaction, particularly for contaminants of soils and sediments.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: March 21, 2000
    Assignees: The United States of America as represented by the United States Environmental Protection Agency, Dyncorp, Inc.
    Inventors: N. Lee Wolfe, Mark G. Cipollone
  • Method for remediating environmental contaminants
    Patent number: 5711020
    Abstract: A method and composition for the remediation of environmental contaminants in soil, sediment, aquifer material or water wherein contaminants are first reduced with a reducing agent found in sediment and are then oxidized to environmentally safe products. The composition includes a reducing agent, solubilized from sediment by a solvent, for reduction of environmental contaminants such as nitroorganics, halogenated hydrocarbons, cyano compounds, anisoles and metals.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: January 20, 1998
    Assignees: The United States of America as represented by the Environmental Protection Agency, Dyncorp, Inc.
    Inventors: N. Lee Wolfe, Laura H. Carreira, Mark C. Delgado