73117090
Feb 25, 1977
Sep 17, 1985
COMBUSTION, [WASTE HANDLING AND POLLUTION CONTROL APPARATUS, NAMELY AERATORS; ANAEROBIC DIGESTER HEATING UNITS, BAG FILTERS AND BAGHOUSE FILTERS, ] BURNERS FOR COAL, OIL AND GAS, INCINERATOR BURNERS; KILN BURNERS, [CONTINUOUS BED FILTERS; GRAVITY FILTERS; TRICKLING FILTERS; FLOCCULATORS; FLUE GAS DESULFURIZATION UNITS; THICKENERS IN THE NATURE OF TANKS WHERE LIQUIDS ARE REMOVED TO LOWER THE LIQUID CONTENT OF A SLURRY OR MIXTURE OF LIQUIDS AND ENTRAINED SOLIDS]
Environmental Control Apparatus[NOISE AND VIBRATION ISOLATION APPARATUS, NAMELY, FLOATING FLOORS COMPRISING FLOORING MATERIAL AND SUPPORTING MEANS THEREFOR; SUSPENDED CEILINGS COMPRISING PANELS AND SUSPENSION MEANS THEREFOR SOLD AS A UNIT]
Nonmetallic Building Materials