The material is a metal or metal-like material having a thermal conductivity in excess of 10 W/mK, and the porous filter body has a porosity of 50-90% and a maximum...http://www.google.com/patents/US5195319?utm_source=gb-gplus-sharePatent US5195319 - Method of filtering particles from a flue gas, a flue gas filter means and a vehicleAdvanced Patent SearchPublication numberUS5195319 APublication ty