CDTI - Not sure, but this looks something positive about CDTI. Please check and comment http://patft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=7964154.PN.&OS=PN/7964154&RS=PN/7964154