That´s important:
We have one unexpired U.S. patent, that will expire in September 2015, and three European and two Japanese patents expiring in October 2016. We also have six U.S. patents, six European, and one Japanese patent that expired between August 2009 and July 21, 2015. While expired patents may have certain retrospective statutory benefits, their value as assets for licensing and cash generation is significantly diminished.
http://www.sec.gov/Archives/edgar/data/836564/000101968715003312/patscientific_10k-053115.htm