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1 result for “Union Carbide Corporation”

1. Patent · April 25, 1944 · page 4

   Shingle and Method of Making Same (US Patent 2,347,250, 1944)

   In the document: …2,847,250 3. A covering unit comprising a base impreg ution includes a tapering of the coating from nated a waterproofing material, a surface the center line of the web substantially uniform 9f saidwith carrying…