US PATENT SUBCLASS 52 / 738.1
.~ Having shell-like outer layer

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

720.1  DF  SHAFT (I.E., ELONGATED RIGID STRUCTURE) {15}
738.1.~ Having shell-like outer layer

DEFINITION

Classification: 52/738.1

Having shell-like outer layer:

(under subclass 720.1) Structure having an outer covering of a material or structural feature differing from that of the enclosed portion of the shaft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

269, for a wall enclosed usable space with a pre-formed dissimilar material lining or shell.

423, for a similar construction wherein a module is bonded together by an internal cast in situ section.

723.1+, and 724.5, for a shaft with a dissimilar material

shell or facing with a stone-like component.

736.3+, for a free-standing shaft with a dissimilar material shell or facing with a stone-like component.

737.4+, for a load-bearing shaft with a dissimilar material shell or facing with a stone-like component.