| http://www.w3.org/ns/prov#value | - gy Earth Oils, Inc.Process and system for recovering oil from oil bearing soil such as shale and tar sands and oil produced by such processUS5199997 *13 Jun 19916 Abr 1993Clnzall CorporationTreatment of hydrocarbon-contaminated particulate materialsUS5223147 *6 Dic 199129 Jun 1993Metallgesellschaft AktiengesellschaftProcess of treating contaminated soilsUS5264118 *26 Dic 199123 Nov 1993Alberta Ene
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