US PATENT SUBCLASS 428 / 318.6
.~.~.~ Of about the same composition as, and adjacent to, the void-containing component

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.~.~.~ Of about the same composition as, and adjacent to, the void-containing component {1}
318.8  DF  .~.~.~.~> Integrally formed skin

DEFINITION

Classification: 428/318.6

Of about the same composition as, and adjacent to, the void-containing component:

(under subclass 318.4) Subject matter wherein a void-containing component has, next to it, a component without voids which varies not more than about 10% in the proportion of its solid constituents from the composition of the void-containing component.

(1) Note. Insofar as synthetic resins, per se, are concerned, the 10% permissible variation is to be applied to the monomer residue content of the finished polymer; differences in molecular weight, crystallinity, etc., are not considered to be differences in composition.