1 result for “Owens-Corning Fiberglas”
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Patent · August 8, 1961
Oil base drilling fluids (US Patent 2,995,514, 1961)
…29, 1957. It was assigned to Nat Lead Co. The patent's description opens: This invention relates to drilling fluids, particularly oilbase drilling fluids as used in the rotary method of drilling oil and gas wells.