US PATENT SUBCLASS 405 / 258
EARTH TREATMENT OR CONTROL

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

258EARTH TREATMENT OR CONTROL {5}
259.1  DF  .~> Rock or earth bolt or anchor {5}
263  DF  .~> Chemical {2}
270  DF  .~> Impermeabilization
271  DF  .~> Compaction
272  DF  .~> Shoring, bracing, or cave-in prevention {6}

DEFINITION

Classification: 405/258

EARTH TREATMENT OR CONTROL:

(under the class definition) Method or apparatus concerning the application of a force, substance, or structure to an earth formation to condition the formation or to prevent undesired movement thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

130+, for earth treatment including a step or means for adding or removing heat from an earth formation.

SEE OR SEARCH CLASS

588, Hazardous or Toxic Waste Destruction or Containment,

249+, for containment of hazardous or toxic waste in any manmade or natural cavity, in addition to any form of extraterrestrial storage.