72314668
Oct 22, 1968
Dec 1, 1970
REFRACTORY METAL POWDERS-NAMELY, TUNGSTEN, TUNGSTEN CARBIDE, TUNGSTEN-COPPER, MOLYBDENUM AND HEAVY METALS; METAL ALLOY POWDERS-NAMELY, STAINLESS STEEL, TOOL STEEL, SUPER ALLOYS, BRAZING AND HARDFACING ALLOYS, [ NICKEL-SILVER, MONEL, ] NICKEL, COBALT AND IRON BASED ALLOYS AND MASTER ALLOYS; TANTALUM POWDER AND COBALT POWDER
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