US PATENT SUBCLASS 428 / 318.8
.~.~.~.~ Integrally formed skin

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

221  DF  WEB OR SHEET CONTAINING STRUCTURALLY DEFINED ELEMENT OR COMPONENT {9}
304.4  DF  .~ Composite having voids in a component (e.g., porous, cellular, etc.) {14}
318.4  DF  .~.~ With nonvoid component of specified composition {3}
318.6  DF  .~.~.~ Of about the same composition as, and adjacent to, the void-containing component {1}
318.8.~.~.~.~ Integrally formed skin

DEFINITION

Classification: 428/318.8

Integrally formed skin:

(under subclass 318.6) Subject matter in which the nonvoid component is identical in composition to the composition of the void-containing component and is formed simultaneously with the void-containing component.

SEE OR SEARCH CLASS

521, Synthetic Resins or Natural Rubbers,

51, for a process of preparing a cellular resin product having an integral skin.