US PATENT SUBCLASS 299 / 4
.~ Input and output wells

Current as of: June, 1999
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299 /   HD   MINING OR IN SITU DISINTEGRATION OF HARD MATERIAL

3  DF  IN SITU CONVERSION OF SOLID TO FLUID {3}
4.~ Input and output wells

DEFINITION

Classification: 299/4

(under subclass 3) Subject matter directed to a plurality of cooperating wells, one of which receives a fluid for insertion into the earth, the other of which produces a fluid from the earth.

SEE OR SEARCH CLASS

166, Wells,

269+, and see the search there noted, for a process comprising the use of input and output wells, especially subclasses 272.1+ for such wells including heating and subclass 52 for plural wells.