U.S. federal trademark · Serial No. 71659634 · Reg. No. 0594725
FREE-FLOWING MATERIAL COMPRISING AS ITS PRINCIPAL INGREDIENT A REACTION PRODUCT OF CAUSTIC SODA AND LIGNITE FOR USE IN THE PREPARATION AND TREATMENT OF OIL EMULSION MUDS AND AS A TREATING AND CONDITIONING AGENT FOR AQUEOUS MUDS AND IN DRILLING WELLS
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