US PATENT SUBCLASS 52 / 404.2
.~ With retaining means penetrating insulating layer

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}
404.2.~ With retaining means penetrating insulating layer

DEFINITION

Classification: 52/404.2

With retaining means penetrating insulating layer:

(under subclass 404.1) Insulating insert including filler piercing means or means intertwining with the filler to effect holding the filler in a desired position in the cavity.