US PATENT SUBCLASS 52 / 309.9
.~.~.~ Nonporous exterior faces

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

309.1  DF  WITH SYNTHETIC RESINOUS COMPONENT {4}
309.4  DF  .~ Foam {4}
309.8  DF  .~.~ Adjacent nonporous layer {2}
309.9.~.~.~ Nonporous exterior faces {1}
309.11  DF  .~.~.~.~> Tie between exterior faces

DEFINITION

Classification: 52/309.9

(under subclass 309.8) Structure wherein the exterior or outermost components are of nonfoam-like material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

782+, for sandwich type panels.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles,

312.8+, for a cellular or porous component including a nonporous or noncellular layer.