E21D

Watch

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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
9890637 Procedure for the construction of cross passages in double pipe tunnels Dec 15, 14 Feb 13, 18 , SWS Engineering S.p.A.; Palmiere S.p.A.;
9885238 Method of preventing leakage of air inside underground cavern Oct 05, 16 Feb 06, 18 , Not available
9873567 Method and system for crop harvest Apr 08, 14 Jan 23, 18 , Not available

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2018/0037,801 COMPRESSIBLE GROUT MIX FOR USE IN ABSORBING COMPRESSIVE OR DEFORMATION STRESSES OF SUBTERRANEAN FORMATIONS Aug 08, 17 Feb 08, 18 , Not available
2018/0030,831 Pumpable Two Component Resin Mar 02, 16 Feb 01, 18 J-LOK CO.,
2018/0030,832 TENSIONABLE CABLE ANCHOR ASSEMBLY AND A TENSIONING DEVICE FOR TENSIONING SAME Aug 03, 15 Feb 01, 18 NCM INNOVATIONS (PTY) LTD,
2018/0023,391 Slotted Tubular Anchor Jul 24, 17 Jan 25, 18 FCI HOLDINGS DELAWARE, INC.,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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