TREA

Richard E. Doerr

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  • Middleburg, FL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drive arrangement for tramming conveyor
    • Patent number 4,817,786
    • Issue date Apr 4, 1989
    • Consolidation Coal Company
    • Richard E. Doerr
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Mine haulage method and apparatus
    • Patent number 4,798,279
    • Issue date Jan 17, 1989
    • Consolication Coal Company
    • Richard E. Doerr
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Conveyor system including a re-railer
    • Patent number 4,784,257
    • Issue date Nov 15, 1988
    • Consolidation Coal Company
    • Richard E. Doerr
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Steering apparatus for a tramming conveyor
    • Patent number 4,773,520
    • Issue date Sep 27, 1988
    • Consolidation Coal Company
    • Richard E. Doerr
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Slurry pump tram control apparatus
    • Patent number 4,611,955
    • Issue date Sep 16, 1986
    • Conoco Inc.
    • Richard E. Doerr
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Slurry pump tram control apparatus
    • Patent number 4,553,881
    • Issue date Nov 19, 1985
    • Conoco Inc.
    • Richard E. Doerr
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Underspoil slurry haulage
    • Patent number 4,415,207
    • Issue date Nov 15, 1983
    • Conoco Inc.
    • Richard E. Doerr
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Slurry recovery from a circular sump
    • Patent number 4,381,161
    • Issue date Apr 26, 1983
    • Conoco Inc.
    • Richard E. Doerr
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Method and apparatus for the filling of a slurry sump
    • Patent number 4,359,298
    • Issue date Nov 16, 1982
    • Conoco Inc.
    • Frederick A. Webb
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Underspoil slurry haulage
    • Patent number 4,286,822
    • Issue date Sep 1, 1981
    • Conoco, Inc.
    • Richard E. Doerr
    • E21 - EARTH DRILLING MINING