US PATENT SUBCLASS 102 / 333
.~ Plug

Current as of: June, 1999
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102 /   HD   AMMUNITION AND EXPLOSIVES

301  DF  BLASTING {11}
333.~ Plug

DEFINITION

Classification: 102/333

Plug:

(under subclass 301) Subject matter which includes means to seal a blast hole opening to confine an explosion or the rapid escape of a fluid under high pressure in a blast hole.

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313, for inserting or placing an explosive in a hollowed-out place which includes plugs.

319, for well-anchoring means with or without an explosive.

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166, Wells,

192+, for well plugs generally.