Tersus secures five patents for in-situ surfactant and chemical oxidant flushing. The patents relate to methods for remediating subsurface contaminants through the use of in-situ surfactant and chemical oxidant flushing for complete remediation of contaminants and methods of using same, for which Letters Patent of the United States were issued for U.S. Patent No. 6,913,419 on July 5, 2005, U.S. Patent No. 7,021,863 on April 4, 2006, U.S. Patent No. 7,364,386 on April 29, 2008, U.S. Patent No. 7,708,496 on May 4, 2010, and U.S. Patent No. 7,677,836 on March 16, 2010. Tersus also secures a non-exclusive sublicense to the Innovative Environmental Technologies, Inc. (IET) United States Patent Nos. 7,531,709 and 7,129,388 (the '709 and '388 patents). The Agreement enables Tersus to develop and commercialize products for in situ chemical reduction (ISCR).