(under subclass 301) Subject matter wherein there is a blasting charge at each of several locations.
(1) Note. The blasting charge includes (a) an explosive, or (b) a fluid under high pressure capable of escaping or being released rapidly for the purposes of breaking up material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
206+, for charge ignition or detonating circuits.
305+, for detonation wave modifying including subclass 310 for plural shaped charges.
313, for placing or inserting charges in a borehole.
317, for similar contained charges joined end to end in a borehole.
319, for a contained charge with well-anchoring means, wall-contacting guides, or buffers. 320, for plural charges at least one a contained charge.
