A diesel particulate filter assembly, and methods for use of such filter assembly, including a housing having an inlet end and an outlet end, a particulate filter portion consisting essentially of mullite fibers and positioned in the housing, an array of honeycomb channels in the filter, a porous wall...http://www.google.com/patents/US7582270?utm_source=gb-gplus-sharePatent US7582270 - Multi-functional substantially fibrous mullite filtration substrates and devices
