US PATENT SUBCLASS 428 / 308.8
.~.~.~ Void-containing component is wood or paper

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}
306.6  DF  .~.~ Void-containing component partially impregnated with adjacent component {3}
308.8.~.~.~ Void-containing component is wood or paper

DEFINITION

Classification: 428/308.8

Void-containing component is wood or paper:

(under subclass 306.6) Subject matter wherein the void-containing component is cellulosic and is claimed as wood or paper.