US PATENT SUBCLASS 428 / FOR 112
.~.~ Void-containing component has a continuous matrix of fibers only (e.g., porous paper, etc.) (428/311.1)

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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

922  DF  STATIC ELECTRICITY METAL BLEED-OFF METALLIC STOCK* {6}
FOR 105  DF  .~ Including a second component containing structurally defined fibers (428/297) {3}
FOR 112.~.~ Void-containing component has a continuous matrix of fibers only (e.g., porous paper, etc.) (428/311.1) {2}
FOR 113  DF  .~.~.~> And a force disintegratable component (e.g., stencil sheet, etc.) (428/311.3)
FOR 114  DF  .~.~.~> Fibers of defined composition (428/311.5) {1}

DEFINITION

Classification: 428/FOR.112

Void-containin component has a continuous matrix of fibers only (e.g., porous paper, etc.):

Foreign art collection wherein a component of the composite is one which depends solely upon fibers for its continuity.