US PATENT SUBCLASS 52 / 737.4
.~.~ 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}
737.1  DF  .~ Girder, column, etc. {4}
737.4.~.~ Having shell-like outer layer {1}
737.5  DF  .~.~.~> Partial sleeve (e.g., collar, etc.)

DEFINITION

Classification: 52/737.4

Having shell-like outer layer:

(under subclass 737.1) 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 preformed dissimilar material lining or shell.

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

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