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
Patent #TitleFiling DateIssue DatePatent Owner
9835030 Rock bolt Feb 06, 14 Dec 05, 17 , Not available
9828760 Formwork for use in the construction of arched structures and method of constructing arched structures Nov 01, 16 Nov 28, 17 Lock-Block Ltd., Lock-Block Ltd.
9828855 Bolt plate magazine and centralizer Apr 22, 15 Nov 28, 17 1311854 ONTARIO LIMITED, 1311854 Ontario Limited
9821512 Method and apparatus for dispensing reactive two-part systems Mar 25, 15 Nov 21, 17 DOW GLOBAL TECHNOLOGIES LLC, Dow Global Technologies LLC
9822506 Construction system for subway station Jan 29, 15 Nov 21, 17 GUANGZHOU XINQIAO CONSTRUCTION SERVICE CO., LTD., Guangzhou Jishi Construction Group Co., Ltd.; Guangzhou Xinqiao Construction Service Co., Ltd.;
9815660 Roof bolting cable bolt feeding device May 06, 14 Nov 14, 17 JOY MM DELAWARE, INC., Joy MM Delaware, Inc.
9820164 Subterranean system comprising wireless communication network and syntactic foam panels Jul 24, 15 Nov 14, 17 CORNERSTONE RESEARCH GROUP, INC., CORNERSTONE RESEARCH GROUP, INC.

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Recent Publications

Not Available
Publication #TitleFiling DatePub DatePatent Owner
2017/0350,087 ARTIFICIAL GROUND FREEZING METHOD AND ARTIFICIAL GROUND FREEZING SYSTEM Apr 22, 15 Dec 07, 17 CHEMICAL GROUTING CO., LTD.,
2017/0342,674 GROUND REINFORCING DEVICE May 31, 16 Nov 30, 17 SOLETANCHE FREYSSINET,
2017/0342,776 Retractable Auger Head May 24, 17 Nov 30, 17 Radius HDD Direct, LLC,
2017/0342,834 METHOD AND APPARATUS FOR FORMING TUNNELS FOR TRANSPORT ROUTES Dec 22, 15 Nov 30, 17 ,
2017/0342,835 CUTTING DEVICE WITH TAPERED CUTTING ELEMENT May 26, 17 Nov 30, 17 JOY MM DELAWARE, INC.,
2017/0342,836 METHOD OF SUPPORTING A ROCK WALL Aug 18, 17 Nov 30, 17 NCM INNOVATIONS (PTY) LTD,
2017/0335,537 SELF-BORING ANCHORING DEVICE AND METHOD OF INSTALLING SUCH AN ANCHORING DEVICE Dec 11, 15 Nov 23, 17 RAPTOR ANCHORING LIMITED,
2017/0335,687 DEVICE FOR BACK SOIL DISTURBANCE IN SHIELD TUNNEL Aug 23, 16 Nov 23, 17 POWERCHINA HUADONG ENGINEERING CORPORATION LIMITED,
2017/0335,688 ROOF SUPPORT MONITORING FOR LONGWALL SYSTEM Aug 04, 17 Nov 23, 17 JOY MM DELAWARE, INC.,
2017/0328,698 NON-DESTRUCTIVE DETECTION METHOD AND DEVICE OF EFFECTIVE ANCHORAGE DEPTH OF FULL-LENGTH BONDING ANCHOR Aug 23, 16 Nov 16, 17 POWERCHINA HUADONG ENGINEERING CORPORATION LIMITED,

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Patents Issued To Date - By Filing Year

Average Time to Issuance

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