US PATENT SUBCLASS 52 / 309.15
.~.~ Core

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

309.1  DF  WITH SYNTHETIC RESINOUS COMPONENT {4}
309.13  DF  .~ With nonresinous component {4}
309.15.~.~ Core

DEFINITION

Classification: 52/309.15

(under subclass 309.13) Structure wherein the nonresinous component is the core or center component, being sandwiched between or surrounded by the resinous component.

(1) Note. The exterior nonresinous component (s) may be openwork in structure.