US PATENT SUBCLASS 220 / 567.1
.~ Underground
Current as of: June, 1999
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DEFINITION
Classification: 220/567.1
Underground:
(under subclass 565) Subject matter wherein the tank is intended for use beneath the surface of the earth.
SEE OR SEARCH CLASS
52, Static Structures, (e.g., buildings),
169.1+, for an on-site erected structure having a claimed feature of the earth or relationship to the earth (e.g., grade level, material between a wall and the earth, underground structures resisting external objects, position in the earth). In particular, search subclass 169.6 for a subterranean enclosure with a portal opening (e.g., bomb shelter) and subclasses 169.7+ for a container which is embedded in the earth and has an open top adjacent the earth's surface.
405, Hydraulic and Earth Engineering,
53+, for means for storing fluid in an earthen cavity wherein the storing means is more than a mere tank having no specific relationship to the earth; and subclass 210 for a product-receiving receptacle which is secured to, and supported by, the earthen bed at the bottom of a body of water.
