E21C41/32 - CPC Classification Index

ClassID:

135918 ⎘

E21C41/32 - CPC Classification

Classification description:

Methods of underground or surface mining ; Layouts therefor Reclamation of surface-mined areas

Recent Application in this class:

20230235667

2023-07-27

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

20230003123

2023-01-05

Comprehensive utilization method and test equipment for surface water, goaf and geothermal energy in coal mining subsidence area

20220251954

2022-08-11

Ecological reconstructed sponge structure of strip mine dump and application of the same

20210221719

2021-07-22

Engineered yeast as a method for bioremediation

20190264562

2019-08-29

Process and system for improved reclamation of mined lands

20180237321

2018-08-23

Engineered yeast as a method for bioremediation

20170370217

2017-12-28

Process and system for improved reclamation of mined lands

20170284200

2017-10-05

Method of moving material

20160326872

2016-11-10

Mining method

#10

20150136566

2015-05-21

Dumping system

#11

20150097413

2015-04-09

Apparatus and method for storing waste material

#12

20150041404

2015-02-12

Treatment of acid mine drainage

#13

20120319452

2012-12-20

Apparatus and method for mining coal

#14

20120138541

2012-06-07

Systems, Compositions, and Methods For Dewatering Mine Tailings

#15

20110203905

2011-08-25

Method for filling bulk material

#16

20110049965

2011-03-03

Apparatus and method for mining coal

#17

20100282688

2010-11-11

Method of raising the pH of acidic bodies of water

#18

20080290718

2008-11-27

Waste disposal during pit mining

#19

20070116523

2007-05-24

SYSTEM AND METHOD FOR REMEDIATION OF WASTE MATERIAL AT CRUSHED STONE QUARRY SITES