TSO3 Inc, announced that the U.S. Food and Drug Administration has cleared TSO3’s expanded indications for use (IFU’s) of its STERIZONE® VP4 Sterilizer.“Our extended IFU claims have been cleared by the FDA demonstrating the truly superior capabilities of our STERIZONE® Sterilization System,” said TSO3 President and CEO, R.M. (Ric) Rumble.