BAROID

CLAYS, METALLIC AND NON-METALLIC MINERALS, MIXED COMPOSITIONS OF MINERAL AND PLANT ORIGIN, CRUDE LIGNITE, CRUDE TANNINS, SHREDDED CELLOPHANE, STARCH, COMMINUTED NUTSHELLS, GROUND BAGASSE, AND THE LIKE, ADAPTED FOR USE IN AND IN CONNECTION WITH THE COMPOUNDING AND TREATMENT OF OIL WELL DRILLING FLUIDS AND LIKE MIXTURES CONTAINING CLAY OR OTHER MINERALS