U.S. federal trademark · Serial No. 78632161 · Reg. No. 3473695
Lightweight media for growing microorganisms for use in a variety of biological and/or biochemical processes or for chemically treating wastes without microorganisms, the media being comprised of a mass of polymeric foam, such as polyurethane foam, having an outer region enclosing an inner region, with a plurality of fragments of an inorganic material, such as sand, at least partially embedded in the outer region
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