for brown or hard coal

Industry

CPC
E21C41/28

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C41/00Methods of underground or surface mining Lay-outs therefor

Current Industry

E21C41/28for brown or hard coal

Industries

Patents Grantslast 30 patents

Information Patent Grant
Dendritic reverse underground mining method for thin coal seam at e...
- Patent number 11,994,027
- Issue date May 28, 2024
- China University of Mining and Technology
- Shuzhao Chen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Underground mining method for unexploited coal in boundary open-pit...
- Patent number 11,821,314
- Issue date Nov 21, 2023
- China University of Mining and Technology
- Shuzhao Chen
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Blasting technique
- Patent number 11,555,681
- Issue date Jan 17, 2023
- Orica International Pte Ltd
- Nigel Brett Pereira
- F42 - AMMUNITION BLASTING
Information Patent Grant
Method for radially mining open-pit end slope pressed coal
- Patent number 11,377,952
- Issue date Jul 5, 2022
- China University of Mining and Technology
- Nan Zhou
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of moving material
- Patent number 10,689,981
- Issue date Jun 23, 2020
- OPTI-MINEZ PTY LTD
- David John Hall
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Mining method
- Patent number 9,739,146
- Issue date Aug 22, 2017
- Xia Zhao
- E21 - EARTH DRILLING MINING
Information Patent Grant
Wall-to-wall surface mining process
- Patent number 5,782,539
- Issue date Jul 21, 1998
- Randall D. Peterson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of mining a mineral deposit seam
- Patent number 5,033,795
- Issue date Jul 23, 1991
- The United States of America as represented by the Secretary of the Interior
- Richard B. Farrar
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of open cut mining
- Patent number 4,466,669
- Issue date Aug 21, 1984
- Gordon Sellers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Underspoil slurry haulage
- Patent number 4,415,207
- Issue date Nov 15, 1983
- Conoco Inc.
- Richard E. Doerr
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Underspoil slurry haulage
- Patent number 4,286,822
- Issue date Sep 1, 1981
- Conoco, Inc.
- Richard E. Doerr
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining apparatus
- Patent number 4,254,993
- Issue date Mar 10, 1981
- Kerr-McGee Corporation
- Dean A. McGee
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for deep mining using chain driven in fixed di...
- Patent number 4,232,904
- Issue date Nov 11, 1980
- Robert L. Hurd
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Float-sink separation of coal with liquid SO.sub.2
- Patent number 4,198,291
- Issue date Apr 15, 1980
- Atlantic Richfield Company
- Jin S. Yoo
- E21 - EARTH DRILLING MINING
Information Patent Grant
Radial mining method
- Patent number 4,195,886
- Issue date Apr 1, 1980
- Henry L. Roye
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining apparatus
- Patent number 4,160,566
- Issue date Jul 10, 1979
- Kerr-McGee Corporation
- Dean A. McGee
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of strip mining
- Patent number 4,150,852
- Issue date Apr 24, 1979
- Charles M. McCoy
- E21 - EARTH DRILLING MINING
Information Patent Grant
Radial mining method
- Patent number 4,072,351
- Issue date Feb 7, 1978
- Henry L. Roye
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining machine having rectangular thrust transmitting conveyor column
- Patent number 4,014,574
- Issue date Mar 29, 1977
- Browning & Bushman
- Robert E. Todd
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
BLASTING TECHNIQUE
- Publication number 20210102793
- Publication date Apr 8, 2021
- ORICA INTERNATIONAL PTE LTD
- Nigel Brett PEREIRA
- F42 - AMMUNITION BLASTING
Information Patent Application
COAL TRACKER
- Publication number 20200091967
- Publication date Mar 19, 2020
- JRL Coal, Inc.
- William Quintrell
- G06 - COMPUTING CALCULATING COUNTING

for brown or hard coal

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Dendritic reverse underground mining method for thin coal seam at e...

Underground mining method for unexploited coal in boundary open-pit...

Blasting technique

Method for radially mining open-pit end slope pressed coal

Method of moving material

Mining method

Wall-to-wall surface mining process

Method of mining a mineral deposit seam

Method of open cut mining

Underspoil slurry haulage

Underspoil slurry haulage

Mining apparatus

Method and apparatus for deep mining using chain driven in fixed di...

Float-sink separation of coal with liquid SO.sub.2

Radial mining method

Mining apparatus

Method of strip mining

Radial mining method

Mining machine having rectangular thrust transmitting conveyor column

Patents Applicationslast 30 patents

BLASTING TECHNIQUE

COAL TRACKER