72117464
Apr 10, 1961
Jul 27, 1965
CHEMICALS FOR TREATING WELLS AND RELATED OIL, WATER, OR GAS HANDLING EQUIPMENT-NAMELY, CORROSION INHIBITORS, SCALE INHIBITORS, WAX SOLVENTS, WATER FLOOD CHEMICALS FOR INCREASING THE FACILITY WITH WHICH WATER WILL FLOOD AN EARTH FORMATION, AND ANTISWELLING AGENTS FOR PREVENTING THE SWELLING OF CLAYS IN EARTH FORMATIONS
Metal Goods