US Patent 8129463 - Mixed DWNT/MWNT nanocomposites

http://www.freepatentsonline.com/8129463.html

This patent from Applied Nanotech is based on the finding that mixtures of multiwall carbon nanotubes and double walled carbon nanotubes can produce improved mechanical properties to nanocomposites at a lower cost than using single walled or double walled nanotubes alone. Claim 7 reads:

7. A method for making a carbon nanotube composite by varying an amount of carbon nanotubes to be added to the composite as a function of the diameters of the carbon nanotubes to increase the flexural strength and the flexural modulus of the carbon nanotube composite.