E21C37/14 - CPC Classification Index

ClassID:

135897 ⎘

E21C37/14 - CPC Classification

Classification description:

Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by compressed air; by gas blast; by gasifying liquids

Recent Application in this class:

20220364468

2022-11-17

Supercritical fluid drilling and blasting integrated double-arm drill jumbo and control method thereof

20190017379

2019-01-17

Drill and blast method and apparatus for the same

20170241220

2017-08-24

Fluid release mechanism for a chemically-inflatable bag

20160146588

2016-05-26

Method of underground rock blasting

20150211367

2015-07-30

Drill and blast method and apparatus for the same

20140021772

2014-01-23

Systems and methods for sonic subsurface material removal

20130057045

2013-03-07

Pulsed Water-Jet Apparatus

20120242135

2012-09-27

Method of underground rock blasting

20110006585

2011-01-13

Mining method

#10

20060169162

2006-08-03

Activated stemming device

#11

20060096487

2006-05-11

Element for initiating propellant

#12

15943041

2021-01-19

Borehole sealing and improved foam properties for controlled foam injection (CFI) fragmentation of hard compact materials