US PATENT SUBCLASS 52 / 784.15
.~.~.~ Insulating core

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

782.1  DF  COMPOSITE PREFABRICATED PANEL INCLUDING ADJUNCTIVE MEANS {7}
783.1  DF  .~ Sandwich or hollow with sheet-like facing members {13}
784.1  DF  .~.~ For door or door shutter {5}
784.15.~.~.~ Insulating core

DEFINITION

Classification: 52/784.15

Insulating core:

(under subclass 784.1) Structure in which a core of material that resists transfer of sound, heat or vibration is located between two sheet-like components.

SEE OR SEARCH THIS CLASS, SUBCLASS:

404.1+, for an insulating insert (e.g., filler in cavity in

preconstructed or cast structure).

784.11+, for a fire resistant door.

791.1, for a panel having an insulating core of a woven material.