TREA

Use of fluid-tight or anti-friction material on outside of, or between, lining layers

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Industry

  • CPC
  • E21D5/012
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Parent Industries

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

Current Industry

E21D5/012Use of fluid-tight or anti-friction material on outside of, or between, lining layers
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Method and apparatus for producing cement or plaster
    • Patent number 4,399,946
    • Issue date Aug 23, 1983
    • Mono Oakes Limited
    • Christopher Stevenson
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • 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

    3695044
    • Patent number 3,695,044
    • Issue date Oct 3, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3636714
    • Patent number 3,636,714
    • Issue date Jan 25, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3593799
    • Patent number 3,593,799
    • Issue date Jul 20, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3554287
    • Patent number 3,554,287
    • Issue date Jan 12, 1971
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    3364996
    • Patent number 3,364,996
    • Issue date Jan 23, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2837109
    • Patent number 2,837,109
    • Issue date Jun 3, 1958
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    2488074
    • Patent number 2,488,074
    • Issue date Nov 15, 1949
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2341574
    • Patent number 2,341,574
    • Issue date Feb 15, 1944
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents