US PATENT SUBCLASS 220 / FOR 132
.~ Evacuated space between layers (220/420)

Current as of: June, 1999
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220 /   HD   RECEPTACLES

FOR 127  DF  MULTILAYER BARRIER STRUCTURE (220/415) {23}
FOR 132.~ Evacuated space between layers (220/420) {3}
FOR 133  DF  .~.~> With intermediate insulating means (220/421) {2}
FOR 136  DF  .~.~> With intermediate reflector means (220/424)
FOR 137  DF  .~.~> Layer-space-layer only (220/425)

DEFINITION

Classification: 220/FOR.132

Evacuated space between layers:

Foreign art collections including a container wherein a space between at least two plies or laminas is below atmospheric pressure.