US PATENT SUBCLASS 52 / 265
.~.~ Layered barrier

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

261  DF  THREE-WAY CORNER CONSTRUCTION (E.G., TWO WALLS AND A FLOOR) {5}
264  DF  .~ Floor supports walls {1}
265.~.~ Layered barrier

DEFINITION

Classification: 52/265

(under subclass 264) Structure in which a barrier (floor or wall) construction is composed of two or more layers of material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

249, 258, 267, and 275+, for a construction forming an intersection involving a barrier of plural layers of material.

506.01+, for a residual construction of dissimilar layers and see the references under "SEARCH CLASS" in subclass 506.01 for various constructions involving a layered structure.