This excerpt taken from the TPTX 10-K filed Mar 27, 2009.
Our policy is to pursue patents, both those generated internally and those licensed from third
(including 14 issued U.S. patents), 53 pertain to NGX267 and/or NGX292 (including 4 issued U.S. patents), and 18 pertain to our GSM program (including 1 issued U.S. patent). Issued patents, and patents that may issue from these pending applications,
would expire between 2010 and 2028. In accordance with the Hatch-Waxman Act in the United States, and corresponding legislation in certain foreign countries, patents covering our drug products may be eligible for up to five years of patent term