Not sure what warrants of Lee Pierhal were about to expire by the look of this (dec.2013):

Warrants....1,295,558.................279,660................0.29........July 21, 2014

Warrants....2,157,348.................284,635................0.34.........June 8, 2015

Warrants....2,770,044.................365,143................0.34........June 22, 2015

Warrants....1,554,000.................208,972................0.34........July 31, 2015

Warrants....6,272,087.................856,893................0.34....September 7, 2015

Warrants....5,369,000.................744,240................0.34...September 13, 2015

Warrants....5,000,000.................687,082................0.35...September 27, 2015

Warrants.. 14,400,000...............3,825,178................0.75....February 14, 2015

C warrants....220,734..................38,642................0.22.........June 8, 2016

C warrants....285,289..................49,943................0.22........June 22, 2016

C warrants....155,400..................27,708................0.22........July 31, 2016

C warrants....522,209..................94,597................0.22....September 7, 2016

C warrants....536,900..................98,681................0.22...September 13, 2016

C warrants....500,000..................91,102................0.22...September 27, 2016

C warrants..1,440,000.................483,114................0.50....February 14, 2016