US PATENT SUBCLASS 428 / 315.5
.~.~ Voids specified as micro

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}
315.5.~.~ Voids specified as micro {2}
315.7  DF  .~.~.~> Specified thickness of void-containing component (absolute or relative) or numerical cell dimension
315.9  DF  .~.~.~> Composite has more than two layers

DEFINITION

Classification: 428/315.5

Voids specified as micro:

(under subclass 304.4) Subject matter wherein the voids of the void-containing component are claimed as being invisible to the naked eye.

(1) Note. Where the voids are described using the word or prefix "micro", the voids are assumed to be invisible to the naked eye.