73220018
Jul 9, 1979
Apr 12, 1983
Sealing Products-Namely, Elastomeric Bitumen Roofing Intended to Constitute Either the Surface Layer of an Improved Multi-Layered Sealing Covering, or the Watertight Coating of Roofing Irregularities Such as Stacks, Rebuildings, Eaves-Gutters
Nonmetallic Building Materials