US PATENT SUBCLASS 52 / 381
.~ Lined cavity formed within monolithic barrier material

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

380  DF  CAST IN SITU BARRIER CONSTRUCTION DEFINING ISOLATED SPACE {2}
381.~ Lined cavity formed within monolithic barrier material {1}
382  DF  .~.~> Closed curvilinear cavity liner

DEFINITION

Classification: 52/381

(under subclass 380) Structure in which the cells or cavities are formed by a discrete liner formed by a wall structure closing on itself, the material of the barrier being cast around and in contact with the wall structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

323, for a cast, ribbed type cast material barrier with a filler formed of cooperating void forming sections.