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
9,062,457 Assembly and method for anchoring rebar to a mass Feb 11, 14 Jun 23, 15 , Not available
9,062,547 Expandable bolt with shielded tip May 31, 11 Jun 23, 15 FCI HOLDINGS DELAWARE, INC., FCI HOLDINGS DELAWARE, INC.
9,051,831 Expandable mine bolt Jun 21, 12 Jun 09, 15 FCI HOLDINGS DELAWARE, INC., Not available
9,045,981 Telescopic safety device Jun 21, 11 Jun 02, 15 RESQTEC-ZUMRO B.V., RESQTEC - ZUMRO B.V.

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2015/0174,789 METHOD FOR WIRE SAW EXCAVATION Feb 27, 15 Jun 25, 15 KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS,
2015/0167,463 DRILL RIG Dec 12, 13 Jun 18, 15 CATERPILLAR GLOBAL MINING EXPANDED PRODUCTS PTY LTD,
2015/0152,728 Device And Method For Driving Tunnels, Galleries Or The Like Aug 30, 12 Jun 04, 15 ATLAS COPCO ROCK DRILLS AB,
2015/0152,729 ROCK BOLTING SYSTEM, METHOD OF INSTALLING ROCK BOLTS, AND FLEXIBLE BOLT CENTRALIZER Jan 26, 15 Jun 04, 15 1311854 ONTARIO LIMITED,

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Patents Issued To Date - By Filing Year

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