TREA

with combinations of different materials

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Industry

  • CPC
  • E21D5/11
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D5/00Lining shafts Linings therefor

Current Industry

E21D5/11with combinations of different materials
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Anti-seismic support method for mine shaft
    • Patent number 11,428,101
    • Issue date Aug 30, 2022
    • CHINA COAL RESEARCH INSTITUTE
    • Qingjie Qi
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Underground support system and method
    • Patent number 11,092,010
    • Issue date Aug 17, 2021
    • DSI TUNNELING LLC
    • John M. Mulvoy
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Prefabricated bamboo composite utility tunnel
    • Patent number 10,184,223
    • Issue date Jan 22, 2019
    • ZHEJIANG XINZHOU BAMBOO-BASED COMPOSITES TECHNOLOGY CO., LTD.
    • Ling Ye
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Shaft construction in the earth and method thereof
    • Patent number 9,255,476
    • Issue date Feb 9, 2016
    • Ric-Man Construction, Inc.
    • Steven M. Mancini
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Composite underground fluid conduit of concrete and steel sections
    • Patent number 4,241,762
    • Issue date Dec 30, 1980
    • Gutehoffnungshutte Sterkrade Aktiengesellschaft
    • Heinz Link
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Concrete well casing with cable hooks embedded therein
    • Patent number 4,070,832
    • Issue date Jan 31, 1978
    • Gottlieb W. Grosch
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Casing voussoir
    • Patent number 3,984,956
    • Issue date Oct 12, 1976
    • Pont-A-Mousson S.A.
    • Jacques Francois Oger
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3516256
    • Patent number 3,516,256
    • Issue date Jun 23, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3415063
    • Patent number 3,415,063
    • Issue date Dec 10, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3334162
    • Patent number 3,334,162
    • Issue date Aug 1, 1967
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    3293865
    • Patent number 3,293,865
    • Issue date Dec 27, 1966
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2149232
    • Patent number 2,149,232
    • Issue date Feb 28, 1939
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1916686
    • Patent number 1,916,686
    • Issue date Jul 4, 1933
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1783812
    • Patent number 1,783,812
    • Issue date Dec 2, 1930
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1618973
    • Patent number 1,618,973
    • Issue date Mar 1, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1618166
    • Patent number 1,618,166
    • Issue date Feb 22, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1594921
    • Patent number 1,594,921
    • Issue date Aug 3, 1926
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1004288
    • Patent number 1,004,288
    • Issue date Sep 26, 1911
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents