US PATENT SUBCLASS 165 / 45
GEOGRAPHICAL
Current as of: June, 1999
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DEFINITION
Classification: 165/45
(under the class definition) Apparatus wherein the structure is related to some feature of the earth.
SEE OR SEARCH CLASS
60, Power Plants,
641.1+, for a power plant utilizing natural heat.
62, Refrigeration,
260, for a refrigerating apparatus having a geos:graphical feature.
126, Stoves and Furnaces, 561+, 569+ and 714, for a solar heater.
166, Wells,
57+, for heat exchange apparatus comprising part of a well apparatus for producing or treating a well.
175, Boring or Penetrating the Earth,
17, for earth boring with means for changing the temperature of all or a portion of a bore or boring equipment within the bore.
299, Mining or In Situ Disintegration of Hard Material,
3+, for in situ conversion of solid to fluid for recovery of valuable material and including melting or other use of heat.
405, Hydraulic and Earth Engineering,
56, for a method or apparatus relating to the heating or cooling of the earth surrounding an underground fluid storage cavity; and subclasses 130+ for subject matter relating to temperature modification of an earth formation.
