72218839
May 14, 1965
Jun 21, 1966
CABOT CORPORATION
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PINE TAR; CHARCOAL; METALLURGICAL COKE, PETROLEUM COKE, ELECTRODE COKE, GAS COKE; SILICA, WOLLASTONITE, GARNET, CHARCOAL BRIQUETTES, AND POLYETHYLENE FOR USE IN THE INDUSTRIAL ARTS