73375561
Jul 19, 1982
Dec 6, 1983
Chemical Preparations-Namely, Polyelectrolytes for Use as Flocculating Agents, Precipitating Agents, Flotation Agents, Sedimentation Agents, Coagulant Aids and as Retention Aids, All Goods for the Filtration Clarification and Purification of Liquids; Thickening Agents for Industrial Use
Chemicals