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.