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)

Subclasses

Not Available
Subclass Title
1/00 Sinking shafts
1/02 Sinking shafts by hand
1/03 Sinking shafts mechanically (E21D 1/08 takes precedence)
1/04 Sinking shafts mechanically (E21D 1/08 takes precedence) with grabs
1/06 Sinking shafts mechanically (E21D 1/08 takes precedence) with shaft-boring cutters (drilling machines E21B)

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Recent Patents

Not Available
Patent #TitleFiling DateIssue DatePatent Owner
8,905,486 Underground mining Jun 30, 10 Dec 09, 14 TECHNOLOGICAL RESOURCES PTY. LIMITED, TECHNOLOGICAL RESOURCES PTY. LTD.
8,899,883 Anchor tendon with selectively deformable portions Dec 22, 09 Dec 02, 14 TECHNOLOGICAL RESOURCES PTY. LIMITED, Not available
8,899,356 Drill bits, cutting elements for drill bits, and drilling apparatuses including the same Dec 28, 10 Dec 02, 14 DOVER BMCS ACQUISITION CORP., DOVER BMCS ACQUISITION CORPORATION
8,894,328 Mine roof bolt assembly Mar 17, 12 Nov 25, 14 DOVER BMCS ACQUISITION CORP., Not available
8,894,329 Wedge anchor bolt May 31, 13 Nov 25, 14 CLIMB TECH, LLC, Not available
8,888,415 Anchor and method of installing anchor Feb 01, 13 Nov 18, 14 N-PAT CO., LTD., N-PAT CO., LTD.
8,887,833 Reamer assembly Aug 22, 11 Nov 18, 14 EARTH TOOL COMPANY, LLC, EARTH TOOL COMPANY LLC

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2014/0363,239 ANCHOR ROD Jul 10, 12 Dec 11, 14 HILTI AKTIENGESELLSCHAFT,
2014/0363,241 Pumpable Crib Jul 28, 14 Dec 11, 14 ,
2014/0356,072 MINE SHAFT LINER PLATE SYSTEM AND METHOD Jun 24, 14 Dec 04, 14 CONTECH ENGINEERED SOLUTIONS LLC,
2014/0357,461 BIT EXCHANGE METHOD AND BIT EXCHANGE DEVICE FOR SHIELD TUNNELING MACHINE May 25, 12 Dec 04, 14 HITACHI ZOSEN CORPORATION,
2014/0346,840 Tool for breaking hammer, breaking hammer, and use thereof Sep 12, 12 Nov 27, 14 SANDVIK MINING AND CONSTRUCTION OY,
2014/0348,596 NESTED MINE ROOF SUPPORTS Aug 11, 14 Nov 27, 14 MICON,
2014/0339,881 Cutter Insert Gum Modification Method And Appratus May 05, 14 Nov 20, 14 ,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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