72338222
Sep 18, 1969
Dec 15, 1970
PLASTIC PIPE, PARTICULARLY RIGID P.V.C. PIPE REINFORCED WITH POLYESTER FIBRE GLASS BONDED EXTERNALLY TO THE PIPE, PIPE FITTINGS, TANKS AND TOWERS USED IN CHEMICAL PROCESSING, AND FITTINGS ASSOCIATED WITH SAID TANKS AND TOWERS IN WHICH A COMBINATION OF RIGID UNPLASTICIZED P.V.C. AND POLYESTER FIBRE GLASS IS USED
Firearms