Patents by Inventor Mikael L. Spangberg

Mikael L. Spangberg 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 of chemical treatment of soils containing hazardous substances susceptible to nucleophillic attack
    Patent number: 8178743
    Abstract: A method for remediating hazardous materials susceptible to nucleophillic attack is disclosed wherein sodium hydroxide is applied to a treatment zone in situ for raising the pH of the treatment zone to at least about 12.5 so that alkaline hydrolysis effectively breaks down the hazardous substance by replacing a leaving group with a nucleophile. The method is well suited for in situ use in the vadose zone to treat contaminated soil and groundwater.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: May 15, 2012
    Assignee: Tetra Tech, Inc.
    Inventors: Ronald Britto, Madhukant Patel, Mikael L. Spangberg, Richard W. Arnseth, Franklin R. Bogle
  • METHOD OF CHEMICAL TREATMENT OF SOILS CONTAINING HAZARDOUS SUBSTANCES SUSCEPTIBLE TO NUCLEOPHILLIC ATTACK
    Publication number: 20100069702
    Abstract: A method for remediating hazardous materials susceptible to nucleophillic attack is disclosed wherein sodium hydroxide is applied to a treatment zone in situ for raising the pH of the treatment zone to at least about 12.5 so that alkaline hydrolysis effectively breaks down the hazardous substance by replacing a leaving group with a nucleophile. The method is well suited for in situ use in the vadose zone to treat contaminated soil and groundwater.
    Type: Application
    Filed: June 30, 2009
    Publication date: March 18, 2010
    Inventors: Ronald Britto, Madhukant Patel, Mikael L. Spangberg, Richard W. Arnseth, Franklin R. Bogle