78485129
Sep 17, 2004
Oct 16, 2007
Artificial lightweight rock and masonry products, wherein said products are constructed to have a polymer or resin shell whose exterior generally denotes a hollow interior, which may be foam filled, the exterior of the shell being further shaped to represent building blocks, slabs, posts, wallboards, retaining walls made of non-metallic materials such as cement, concrete, stone, and the like
Nonmetallic Building Materials