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
9,388,690 Tunnel excavation method Jun 05, 13 Jul 12, 16 KOMATSU LTD., KOMATSU LTD.
9,388,691 Protective element, concrete element, and method for producing a concrete element Jan 12, 10 Jul 12, 16 HERRENKNECHT AG, HERRENKNECHT AG
9,388,692 Dust collection system for a machine Jul 31, 13 Jul 12, 16 CATERPILLAR GLOBAL MINING AMERICA LLC, CATERPILLAR GLOBAL MINING AMERICA, LLC
9,376,912 Apparatus and method for anchor bolt grouting Aug 21, 13 Jun 28, 16 FCI HOLDINGS DELAWARE, INC., FCI HOLDINGS DELAWARE, INC.

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2016/0208,607 Skip and Crosshead Aug 25, 14 Jul 21, 16 , Not available
2016/0208,608 BARRIER FORMING APPARATUS Sep 04, 14 Jul 21, 16 , Not available
2016/0208,609 SUPPORT FOR USE IN MINE Sep 29, 14 Jul 21, 16 , Not available
2016/0201,459 MOBILE CONVEYOR DEVICE FOR THE DELIVERY OF TUNNEL LINERS Jan 13, 16 Jul 14, 16 RELINE AMERICA, INC.,
2016/0194,957 Compound-Type Tunnelling Shield Aug 06, 14 Jul 07, 16 ,
2016/0186,563 Self-Undercut Anchor System Jun 25, 14 Jun 30, 16 ,
2016/0186,564 FRICTION BOLT ASSEMBLY Jul 29, 14 Jun 30, 16 DYWIDAG-SYSTEMS INTERNATIONAL PTY LIMITED,
2016/0186,566 APPARATUS, SYSTEM AND METHOD FOR MATERIAL EXTRACTION IN UNDERGROUND HARD ROCK MINING Aug 12, 14 Jun 30, 16 ,
2016/0177,718 MULTIPLE-POINT ANCHORED ROCK BOLT Dec 11, 14 Jun 23, 16 NCM INNOVATIONS (PVT) LTD,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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