US Patent 8043593 - Silicon nanopowder

http://www.freepatentsonline.com/8043593.html

This patent has early priority (2003) and teaches a method of forming high purity crystalline silicon nanopowder including doping components useful to nanoelectronic processing. Claim 1 reads:

1. A silicon powder consisting of aggregated spherical crystalline silicon particles obtained by coalescence of spherical silicon particles in the reaction zone of a hot wall reactor, wherein the aggregated crystalline silicon powder has a BET surface area of 20 to 150 m2/g.

US Patent 7927570 - Silicon nanopowder

http://www.freepatentsonline.com/7927570.html

BET theory is used to explain the adsorption of gas molecules on solid surfaces and can be used in the measurement of the specific surface area of a material.  This patent from Evonik Degussa GmbH discloses a process to form silicon nanopowder with high BET surface area useful to electronics applications. Claim 1 reads:

1. An aggregated crystalline silicon powder, comprising lithium as a doping component; wherein a proportion of lithium is up to 53 wt. %, and a BET surface area of the aggregated crystalline silicon powder is from 20 to 150 m2/g.

US Patent 7837892 - Rubber compound containing nanoscale magnetic fillers

http://www.freepatentsonline.com/7837892.html

This patent deals with a way to improve the thermal properties of rubber without sacrificing any of the mechanical properties by using nanoscale magnetic filler. Claim 1 reads:

1. A rubber compound comprising

at least one non-magnetic filler and

at least one nanoscale, magnetic filler, which is in the form of aggregates of non-magnetic metal oxide matrices having nanoscale, magnetic metal oxide domains.