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
9,376,912 Apparatus and method for anchor bolt grouting Aug 21, 13 Jun 28, 16 , FCI HOLDINGS DELAWARE, INC.
9,371,850 Anchor head and anchor nut for a tension anchor Feb 12, 14 Jun 21, 16 FIREP REBAR TECHNOLOGY GMBH, FIREP REBAR TECHNOLOGY GMBH
9,359,137 Tunneled gas storage Jul 17, 13 Jun 07, 16 TECTONA LTD., TECTONA LTD.
9,359,725 Stepwise repeated destabilization and stabilization of highly collapsible soil mass by ‘soil nailing technique’ used for construction of railway/road underpass Jul 17, 13 Jun 07, 16 COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH, COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2016/0186,563 Self-Undercut Anchor System Jun 25, 14 Jun 30, 16 , Not available
2016/0186,564 FRICTION BOLT ASSEMBLY Jul 29, 14 Jun 30, 16 , Not available
2016/0186,566 APPARATUS, SYSTEM AND METHOD FOR MATERIAL EXTRACTION IN UNDERGROUND HARD ROCK MINING Aug 12, 14 Jun 30, 16 , Not available
2016/0177,718 MULTIPLE-POINT ANCHORED ROCK BOLT Dec 11, 14 Jun 23, 16 NCM INNOVATIONS (PVT) LTD,
2016/0168,993 YIELDABLE ROCK ANCHOR Jul 12, 13 Jun 16, 16 MINOVA INTERNATIONAL LIMITED,
2016/0160,644 SOLUTION MINING A STABLE ROOF UNDER AN INERT GAS Jun 29, 15 Jun 09, 16 AIR LIQUIDE LARGE INDUSTRIES U.S. LP,
2016/0153,278 TEMPORARY ROOF SUPPORT SYSTEM Feb 04, 16 Jun 02, 16 CATERPILLAR GLOBAL MINING AMERICA LLC,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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