72354759
Mar 12, 1970
Jul 27, 1971
CHEMICAL COMPOUNDS THAT ARE ADDED TO WATER USED IN SWIMMING POOLS AND THE LIKE TO SOFTEN THE WATER, TO REDUCE THE PREJUDICIAL EFFECTS OF ITS TREAMENT BY CHLORINE, TO DISSOLVE GREASY CONTAMINATIVES, TO REPRESS ALGAE FORMATION AND TO ASSIST CHLORINE IN KILLING BACTERIA
Metal Goods