Here's some other research data. In Guamtanamo they kept prisoners awake 11 days and found "surprisingly, little seem[s] to go wrong with the subjects physically." In rat experiments they all died by 32 days. I'm guessing full sleep depravation in humans would have a similar result to rats though thankfully no one seems to have tried that.
http://www.slate.com/articles/news_and_politics/explainer/20...