US Patent 8114518 - High-purity SWCNT aligned array

http://www.freepatentsonline.com/8114518.html

This patent is from Japan's National Institute of Advanced Industrial Science and Technology and includes some broad claims with priority going back to 2005 for purified single walled carbon nanotube arrays. Claim 1 reads:

1. A single-walled carbon nanotube having a specific surface area of between 800 m2/g or more and 2500 m2/g or less; and having a purity measured by fluorescence X-rays of 98% or more.