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

Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2017/0284,801 Tunnel Convergence Detection Apparatus and Method Mar 28, 17 Oct 05, 17 QUEEN'S UNIVERSITY AT KINGSTON,
2017/0275,947 IMPROVED SELF-SUPPORTING PNEUMATIC HAMMER POSITIONER WITH UNIVERSAL JOINT Aug 17, 15 Sep 28, 17 R.N.P. INDUSTRIES INC.,
2017/0275,993 LONGWALL SYSTEM FACE ALIGNMENT DETECTION AND STEERING Mar 24, 16 Sep 28, 17 JOY MM DELAWARE, INC.,
2017/0275,994 Temporary Support and Raising Device Jun 05, 15 Sep 28, 17 MMC INNOVATIONS LLP,
2017/0268,335 MINING SYSTEMS Apr 10, 17 Sep 21, 17 SENECA INDUSTRIES INC.,
2017/0268,336 EXCAVATION ASSEMBLY FOR USE IN EXCAVATOR Dec 17, 15 Sep 21, 17 ,
2017/0268,337 ROLLER BRACKET FOR TUNNEL FORMS Mar 06, 17 Sep 21, 17 ,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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