19 (Based on Section 44(e)) Linings (not of metal) for building; tank liners; non-metallic tank liners; tank liners made from plastic, PVC, polyethylene; woven polyethylene tank and liquid storage liners with waterproof properties; storage tank liners for retaining liquid; membranes for the storage of liquids; industrial plastic products in this class; non-metallic water containment barriers; barrier apparatus (non-metallic structures); barriers of non-metallic materials; plastic barrier apparatus; plastic barriers (structures); non-metallic membranes; liquid containment systems in this class; materials, not of metal, for building and construction; polymers and elastomers for use in construction; water collection systems; water storage systems; PVC membranes; non-metallic building materials having waterproof properties