A cryogenic fuel tank adapted for attachment to an aerospace vehicle includes an exterior layer of reinforced composite insulating foam. The insulating foam is reinforced with an aramid fiber mesh or a closed cell foam may be reinforced with one or more of carbon nanotubes, graphite whiskers, silicon...http://www.google.com/patents/US20050001100?utm_source=gb-gplus-sharePatent US20050001100 - Reinforced foam covering for cryogenic fuel tanks
