US PATENT SUBCLASS 52 / 406.3
.~.~ Insert containing chamber

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

404.1  DF  INSULATING INSERT; E.G., FILLER IN CAVITY IN PRECONSTRUCTED OR CAST STRUCTURE {7}
406.1  DF  .~ Enveloped-type filler {2}
406.3.~.~ Insert containing chamber

DEFINITION

Classification: 52/406.3

Insert containing chamber:

(under subclass 406.1) Enveloped filler wherein the insulating filler includes spaced apart air-enclosing cells or compartments.