US PATENT SUBCLASS 52 / 506.04
.~.~.~ Double wall, ceiling, or floor

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

506.01  DF  SHEETLIKE ELEMENT ASSEMBLED PARALLEL TO EXISTING WALL, CEILING, OR FLOOR (E.G., INSULATING PANEL, SHEATHING) {10}
506.02  DF  .~ For furnace or refrigeration {1}
506.03  DF  .~.~ Mounted on frame {1}
506.04.~.~.~ Double wall, ceiling, or floor

DEFINITION

Classification: 52/506.04

Double wall, ceiling, or floor:

(under subclass 506.03) Furnace or refrigerator elements on a frame including an additional planar structure fixed to one side of the member, wherein said structure is coextensive with a previous wall, ceiling, or floor fixed to the other side of the member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

481.1+, for stud between vertical sheetlike sections.