E21D

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Description

SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS (soil-conditioning or soil-stabilising materials C09K 17/00; cutting machines for mining or quarrying E21C; safety devices, transport, rescue, ventilation or drainage E21F)

Recent Patents

Not Available
Patent #TitleFiling DateIssue DatePatent Owner
8,888,415 Anchor and method of installing anchor Feb 01, 13 Nov 18, 14 , N-PAT CO., LTD.
8,887,833 Reamer assembly Aug 22, 11 Nov 18, 14 , EARTH TOOL COMPANY LLC
8,876,218 Hydraulic circuit for longwall support Mar 15, 12 Nov 04, 14 TIEFENBACH CONTROL SYSTEMS GMBH, TIEFENBACH CONTROL SYSTEMS GMBH
8,876,436 Rock bolt Dec 06, 12 Nov 04, 14 RSC MINING (PTY) LTD, RSC MINING (PTY) LTD

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2014/0339,881 Cutter Insert Gum Modification Method And Appratus May 05, 14 Nov 20, 14 , Not available
2014/0334,885 ANCHOR, ESPECIALLY A ROCK ANCHOR Oct 17, 12 Nov 13, 14 , Not available
2014/0327,292 TUNNEL EXCAVATION DEVICE May 31, 12 Nov 06, 14 KOREA RAILROAD RESEARCH INSTITUTE,
2014/0327,293 FREE-WHEELING-RESISTANT ROLLS FOR MINING ROOF SUPPORT AND THE COMBINATION OF A MINING MACHINE AND SUCH ROLLS May 09, 14 Nov 06, 14 THE TENSAR CORPORATION,
2014/0321,924 DETACHABLE BOLT Apr 25, 13 Oct 30, 14 ,
2014/0318,263 TENSION METER FOR ANCHOR ROD WITH CONSTANT RESISTANCE AND LARGE DEFORMATION Jun 13, 11 Oct 30, 14 ,
2014/0314,490 PUMPABLE MINE VENTILATION STRUCTURE Feb 07, 14 Oct 23, 14 ABC INDUSTRIES, INC.,
2014/0314,503 Grouting method for anchoring with polymer Apr 19, 13 Oct 23, 14 HENAN POLYTECH INFRASTRUCTURE REHABILITATION LTD.,

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