US Patent 7150864 - Single Walled / Double Walled Nanotube Rope

Based on research initially conducted by Richard Smalley and others at Rice University, high purity single walled carbon nanotubes can be fabricated. This patent presents some broad claims to the product of such manufacture including both single and double walled nanotubes. Claim 1 reads:

1. A rope of carbon nanotubes comprising single-wall and double-wall carbon nanotubes.