3911 Petroleum Resins, Coumarone-indene Resins, Polyterpenes, Polysulphides, Polysulphones and Other Polymers and Prepolymers Produced by Chemical Synthesis, N.e.s., in Primary Forms

3911 (01/1988-..) Petroleum Resins, Coumarone-indene Resins, Polyterpenes, Polysulphides, Polysulphones and Other Polymers and Prepolymers Produced by Chemical Synthesis, N.e.s., in Primary Forms 39111000 (01/1988-..) Petroleum Resins, Coumarone, Indene or Coumarone-indene Resins and Polyterpenes, in Primary Forms 39119010 (01/1988-12/1996) Condensation or Rearrangement Polymerization Products, Whether or not Chemically Modified, N.e.s., in Primary Forms 39119011 (01/1997-..) Poly`oxy-1,4-phenylenesulphonyl-1,4-phenyleneoxy-1,4-phenyleneisopropylidene-1,4-phenylene` in Blocks of Irregular Shape, Lumps, Powders, Granules, Flakes and Similar Bulk Forms, Whether or not Chemically Modified 39119013 (01/1997-..) Poly`thio-1,4-phenylene`, Whether or not Chemically Modified, in Primary Forms 39119019 (01/1997-..) Condensation or Rearrangement Polymerization Products, Whether or not Chemically Modified, N.e.s., in Primary Forms (Excl. Poly`oxy-1,4-phenylenesulphonyl-1,4-phenyleneoxy-1,4-phenyleneisopropylidene-1,4-phenylene` in Blocks of Irregular Shape, Lumps, PoWders, Granules, Flakes and Similar Bulk Forms and Poly`thio-1,4-phenylene) 39119090 (01/1988-12/1996) Polymer and Prepolymer Plastics Produced by Chemical Synthesis, N.e.s., in Primary Forms 39119091 (01/1997-12/2009) Copolymer of P-cresol and Divinylbenzene, in the Form of a Solution in N, N-dimethylacetamide, Containing by Weight >= 50% of Polymer, Produced by Chemical Synthesis 39119092 (01/2010-..) Hydrogenated Copolymers of Vinyltoluene and Alfa-methylstyrene, and Copolymer of <e>p</E>-cresol and Divinylbenzene, in the Form of a Solution In<e> N, N</E>-dimethylacetamide Containing by Weight?á50% or More of Polymer, Produced by Chemical Synthesis, IN Primary Forms 39119093 (01/1997-12/2009) Hydrogenated Copolymers of Vinyltoluene and Alfa-methylstyrene, Produced by Chemical Synthesis, in Primary Forms 39119099 (01/1997-..) Polymer and Prepolymer Plastics Produced by Chemical Synthesis, N.e.s., in Primary Forms (Excl. Copolymer of P-cresol and Divinylbenzene in the Form of a Solution in N, N-dimethylacetamide Containing by Weight >= 50% of Polymer and Hydrogenated Copolymers of Vinyltoluene and Alfa-methylstyrene)