| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 4,216,130 of Rigge et al., issued Aug. 5, 1983, teaches that bauxite can be rendered compatible with carpet backing polymer compositions if it is processed so as to have an alumina (Al2 O3) content of from about 40% to about 60% by weight wherein the Al2 O3 is in hydrated form, with the balance being Fe2 O3, TiO2 and SiO2 and other impurities, and the bauxite must be ground so as to
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