E21D

Watch

Stats

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
9945668 Tunnel convergence detection apparatus and method Mar 28, 17 Apr 17, 18 , Queen's University at Kingston
9945229 Formwork system Mar 06, 17 Apr 17, 18 , Not available
9938828 Mobile conveyor device for the delivery of tunnel liners May 22, 17 Apr 10, 18 , Not available
9932812 Excavation status monitoring system for tunneling machine Nov 12, 13 Apr 03, 18 , HITACHI ZOSEN CORPORATION
9932826 Mobile mining Aug 13, 13 Apr 03, 18 , Caterpillar Global Mining Europe GmbH
9927339 Device, system and method for dynamic testing of ground support bolts, anchor bolts or rock bolts Feb 05, 14 Mar 27, 18 , Sandvik Intellectual Property AB
9926784 Float-swing hydraulic support Nov 30, 15 Mar 27, 18 , China University of Mining and Technology

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2018/0094,524 FILL FENCE SYSTEM AND METHOD FOR INSTALLING SAME Oct 04, 17 Apr 05, 18 , Sturda Inc.
2018/0087,381 ROCK BOLT WITH ELONGATING SECTION Sep 25, 17 Mar 29, 18 , Not available
2018/0080,322 AUTOMATED DEVICE FOR DRILLING A HOLE IN THE VAULT AND WALLS OF A TUNNEL AND FOR INSTALLING AN ANCHORING ELEMENT INTO SAID HOLE Sep 22, 17 Mar 22, 18 , Not available
2018/0080,219 FORMWORK FOR USE IN THE CONSTRUCTION OF ARCHED STRUCTURES AND METHOD OF CONSTRUCTING ARCHED STRUCTURES Nov 27, 17 Mar 22, 18 , Not available
2018/0080,321 APPARATUS FOR MAKING UNDERGROUND RESERVOIR Nov 28, 17 Mar 22, 18 , Not available

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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