TREA

John W. McCaskill

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  • Tyler, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pipe joint with remotely operable latch
    • Patent number 4,185,856
    • Issue date Jan 29, 1980
    • McEvoy Oilfield Equipment Company
    • John W. McCaskill
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Balanced stem fail-safe valve system
    • Patent number RE30115
    • Issue date Oct 16, 1979
    • Exxon Production Research Company
    • David P. Herd
    • 251 - Valves and valve actuation
  • Information Patent Grant

    High pressure valve
    • Patent number 4,029,294
    • Issue date Jun 14, 1977
    • McEvoy Oilfield Equipment Co.
    • John Walton McCaskill
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Balanced stem fail-safe valve system
    • Patent number 3,933,338
    • Issue date Jan 20, 1976
    • Exxon Production Research Company
    • David P. Herd
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...