73254100
Mar 17, 1980
Nov 9, 1982
Industrial and Commercial Units and Systems for Cooling, Heating, and Treating Water and Other Process Fluids, Comprising One or More of the Following: Water Chillers; Sand and Gravel Water Filters; Water Cooling Towers; Compressed Air Dryers; Blown Film Coolers; Ion Exchange Water Softeners; Chemical Feeders for Corrosion Inhibition in Water Supply Systems; Bleed-Off Controllers for Reduction of Solids Concentration in Water Supply Systems; Acid Feeders for Control of pH in Water Supply Systems; Combination Heater and Temperature Control Units for Process Liquids; Heat Pumps; Heat Recovery Units; Closed Circuit Water Coolers; Booster Pumps for Water Chillers, Water Cooling Towers, Heat Pumps and Heat Recovery Units
Environmental Control Apparatus