Patents by Inventor Lawrence H. Lessard

Lawrence H. Lessard 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).

  • Gel-based remedial additive for remediation of environmental media and method of use
    Patent number: 7381337
    Abstract: The invention is a formulation for remedial additives to be introduced into environmental medium, where the formulation is designed to reduce unwanted movement through the environmental medium. The formulation includes an inorganic thickening agent to adjust viscosity and a diluent, in addition to components for chemical and/or bioremediation.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: June 3, 2008
    Assignee: Lessard Environmental, Inc.
    Inventor: Lawrence H. Lessard
  • Method for the remediation of contaminated soil and/or groundwater via integrated chemical and biological treatment
    Patent number: 6923596
    Abstract: The invention provides repeated sequential stages of chemical and biological treatment to meet soil and/or groundwater treatment goals. Chemical treatment is undertaken to directly destroy a portion of the contaminants via oxidation, with such chemical treatment occurring in discrete injection events. Near the completion of an injection event, the remedial additive concentrations or delivery rates are increased. During or subsequent to the chemical treatment event, beneficial nutrients and additional microbial populations are added to the soil and or groundwater based upon field or laboratory testing and calculated optimal concentrations.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: August 2, 2005
    Assignee: Lessard Environmental, Inc.
    Inventor: Lawrence H. Lessard
  • Method for the remediation of contaminated soil and/or groundwater via integrated chemical and biological treatment
    Publication number: 20040067106
    Abstract: The invention provides repeated sequential stages of chemical and biological treatment to meet soil and/or groundwater treatment goals. Chemical treatment is undertaken to directly destroy a portion of the contaminants via oxidation, with such chemical treatment occurring in discrete injection events. Near the completion of an injection event, the remedial additive concentrations or delivery rates are increased. During or subsequent to the chemical treatment event, beneficial nutrients and additional microbial populations are added to the soil and or groundwater based upon field or laboratory testing and calculated optimal concentrations.
    Type: Application
    Filed: October 2, 2003
    Publication date: April 8, 2004
    Inventor: Lawrence H. Lessard