They are keeping it for himselves in a selfish atitude.
Then, when they give up on trying they MAYBE share some bit of it...
That's why the research doesnt evolute.
Who knows what more they are holding in their hands.... 
im pretty sure of it...
you know what, i believe his documents had the way to do it... but only someone who studied real science with real interest like physics like i did can understand what exactly stan wanted to talk.. is different what he did from what he wrote from what he sells..
if this people contact me i would help them... just to see it available to use for the world...
i believe that if they got it they already have it working secretly in many places like google and others... battery factories and so on