71637607
Nov 4, 1952
Apr 26, 1955
NORTON COMPANY
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HEAT REFRACTORY PRODUCTS FOR LABORATORY USE-NAMELY, REFRACTORY BRICKS, PLATES, TUBES, RODS, CORES, MUFFLES, CRUCIBLES, CAPSULES, COMBUSTION BOATS, DISHES, CATALYST SUPPORTS, AND HEAT EXCHANGE PEBBLES