72334508
Aug 6, 1969
Jul 20, 1971
BARTHEL CHEMICAL CONSTRUCTION CO.
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PLASTIC CONTAINERS FOR USE IN CHEMICAL PROCESS EQUIPMENT-NAMELY, CHEMICAL STORAGE TANKS
PLASTIC COMPONENTS FOR USE IN CHEMICAL PROCESS EQUIPMENT-NAMELY, PIPE AND FITTINGS
PLASTIC CHEMICAL PROCESS EQUIPMENT AND COMPONENTS THEREFOR-NAMELY, CHEMICAL REACTION TOWERS AND FUME SCRUBBERS