73141306
Sep 15, 1977
May 19, 1981
CHEMICALS FOR USE IN DRILLING, PRODUCTION, TRANSPORTING, AND REFINING OF OIL, GAS, GEOTHERMAL HEAT, AND MINERALS RECOVERED FROM THE EARTH-NAMELY, FLOCCULANTS, EMULSIFIERS, CLAY STABILIZERS, SCALE REMOVERS, SURFACTANTS, MICROBIOCIDES, AND DEFOAMERS
Chemicals